Gengar Gang

Every Mega in the format stands on a body that one Chaotic Pain kills

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Deck List

Pokémon (20)

QtyCardSetNumberReg
3Okidogi exShrouded Fable036H
4GastlyPerfect Order048J
2HaunterPhantasmal Flames055I
3Gengar ex30th Celebration090J
2Mega Gengar exPhantasmal Flames056I
4ToxelPhantasmal Flames067I
2ToxtricityPhantasmal Flames068I

Trainers (30)

QtyCardTypeSetNumberReg
3Lillie's DeterminationSupporterMega Evolution119I
2Grimsley's MoveSupporterPhantasmal Flames090I
2DawnSupporterPhantasmal Flames087I
2HildaSupporterWhite Flare084I
2Team Rocket's PetrelSupporterDestined Rivals176I
1Janine's Secret ArtSupporterShrouded Fable059H
2Boss's OrdersSupporterMega Evolution114I
1AZ's TranquilitySupporterChaos Rising076J
4Rare CandyItemMega Evolution125I
2Buddy-Buddy PoffinItemTemporal Forces144H
2Poke PadItemPerfect Order081J
2SwitchItemMega Evolution130I
2Energy RecyclerItemDestined Rivals164I
1Hero's CapeToolTemporal Forces152H
2Risky RuinsStadiumMega Evolution127I

Energy (10)

QtyCardSetNumberReg
10Basic Darkness EnergyMega Evolution Energies007-

20 + 30 + 10 = 60. ✓ Eleven Basics, fifteen Supporters, one ACE SPEC, and nothing over four copies.

Eleven Basics is a 22% mulligan, down from 26%. The opening seven holds an Okidogi 32% of the time, and a dog with an Energy 22% of the time. It holds at least one Gastly 40% of the time. About a quarter of opening hands (26%) hold no Energy at all, which is what Hilda, Poisonous Musculature, and Janine's are for. Poffin and Poke Pad find all eight small Basics; the dogs come from Call for Family, Dawn, and Grimsley's.

Pokémon

Okidogi exx3

Set
SV: Shrouded FableSV: Shrouded Fable 036/064
Rarity
Double RareDouble Rare
Type
DarknessDarkness
HP
250
Stage
Basic
Weakness
FightingFighting ×2
Retreat
ColorlessColorlessColorless3
Tournament
OKlegal (Reg H)
Attack
ColorlessPoisonous Musculature - Search your deck for up to 2 Basic Darkness Energy cards and attach them to this Pokémon. Then, shuffle your deck. If you attached Energy to a Pokémon in this way, this Pokémon is now Poisoned.
Attack
DarknessDarknessColorlessChain-Crazed (130+) - If this Pokémon is Poisoned, this attack does 130 more damage.

250 HP Basic, Fighting Weakness, Retreat 3. The shield, and on Live the most dependable early attacker in the deck.

Poisonous Musculature costs Colorless. It searches up to two Basic Darkness Energy out of the deck, attaches them to the dog, and Poisons it. One Energy from the hand becomes three on the board, which is the best Energy deal in the format. The deck takes both, every time.

Chain-Crazed does 130, and 130 more while this Pokémon is Poisoned. That is 260 for DarknessDarknessColorless, and 520 into anything weak to Darkness. It one-shot a Dhelmise, a Spiritomb, and a Mew ex on Live, and it does the same to Alakazam, Munkidori, and Jellicent ex.

Poison ends the moment the dog leaves the Active Spot. A retreat, a Switch, an AZ's, or their Boss's Orders all end it, and Chain-Crazed is back to 130 until Janine's or another Musculature turn restores it. The dog wants to stand still.

Three copies, one in play. It opens 32% of the time, and 22% of hands hold a dog with an Energy. The second stays off the Bench while the first is alive, because every benched dog is a Pokémon ex their Boss's Orders can find. A dog that is going to die anyway swings first.

Gastlyx4

Set
ME03: Perfect OrderME03: Perfect Order 048/088
Rarity
CommonCommon
Type
DarknessDarkness
HP
70
Stage
Basic
Weakness
FightingFighting ×2
Retreat
Colorless1
Tournament
OKlegal (Reg J)
Attack
DarknessSurprise Attack (30) - Flip a coin. If tails, this attack does nothing.

70 HP, which keeps it inside Poffin and Poke Pad range. It is Darkness, so Risky Ruins never touches it and Janine's can feed it.

Four copies, the highest-leverage count in the deck. Five Stage 2 cards and two Haunter sit on this one Basic, and Grimsley's is the only way around it. One goes to the Bench on the deck's first turn whether it is needed or not, because Rare Candy can't evolve a Pokémon that arrived this turn.

It is also where the Cape goes. A Tool stays attached through evolution, so the Cape on the Gastly headed for a Candy becomes a Gengar ex that lands at 380.

The Live list plays the Temporal Forces Gastly for the art. That print is 60 HP and mark H, so the paper list runs Perfect Order 048 at 70.

Haunterx2

Set
ME02: Phantasmal FlamesME02: Phantasmal Flames 055/094
Rarity
UncommonUncommon
Type
DarknessDarkness
HP
100
Stage
Stage 1
Weakness
FightingFighting ×2
Retreat
Colorless1
Tournament
OKlegal (Reg I)
Attack
DarknessSpooky Shot (40)

Two copies, and two jobs. It is the no-Candy route, since Gastly to Haunter to Gengar ex needs only time. It is also the safe step, turning an exposed Gastly into a 100 HP, one-Prize Haunter that becomes a Gengar next turn.

Sinister Surge reaches a benched Haunter, so Surges load a Haunter that evolves into a Gengar ex already holding Energy. Candy is the speed route and lands empty; Haunter is the Energy route. The simulator also says the last Haunter carries real weight. Cutting to zero cost about seven points of Gengar speed by turn 5 in every test.

Gengar exx3

Set
ME: 30th Celebration 090/128
Rarity
Double RareDouble Rare
Type
DarknessDarkness
HP
280
Stage
Stage 2
Ability
Fainting Spell - If this Pokémon is Knocked Out by damage from an attack from your opponent's Pokémon, flip a coin. If heads, the Attacking Pokémon is Knocked Out.
Weakness
FightingFighting ×2
Retreat
ColorlessColorless2
Tournament
OKlegal (Reg J)
Attack
DarknessDarknessChaotic Pain - Place 13 damage counters on 1 of your opponent's Pokémon.

Stage 2, 280 HP, Fighting Weakness, Retreat 2. 30th Celebration 090, mark J. The deck.

Chaotic Pain costs DarknessDarkness and places 13 damage counters on 1 of the opponent's Pokémon. Who Chaotic Pain hits has the target order.

280 HP has a band. It survives every hit at 270 or under, including Phantom Dive at 200, Nebula Beam at 210, Vengeful Anchor at 170, and a bare Aura Jab at 260. It dies to everything at 380 or over, like Gaia Wave at 400 through Weakness and Mega Brave at 540. The hits in between are what Hero's Cape is for.

Fainting Spell flips a coin when this Pokémon is Knocked Out by damage from an attack, and on heads the Attacking Pokémon is Knocked Out too. It works against any attacker, ex or not. On Live it took a Mega Zygarde, a Mega Floette, and a Dhelmise. When to stand and when to pull has the rule.

Three copies, because this is the card that attacks, and so the card that dies.

Mega Gengar exx2

Set
ME02: Phantasmal FlamesME02: Phantasmal Flames 056/094
Rarity
Double RareDouble Rare
Type
DarknessDarkness
HP
350
Stage
Stage 2
Ability
Shadowy Concealment - If 1 of your Darkness Pokémon is Knocked Out by damage from an attack from your opponent's Pokémon ex, that player takes 1 fewer Prize card. The effect of Shadowy Concealment doesn't stack.
Weakness
FightingFighting ×2
Retreat
ColorlessColorless2
Tournament
OKlegal (Reg I)
Attack
DarknessDarknessVoid Gale (230) - Move an Energy from this Pokémon to 1 of your Benched Pokémon.

Stage 2 from Haunter. 350 HP. Gives up 3 Prizes, or 2 once its own Ability applies.

Shadowy Concealment takes one Prize off every Knock Out the opponent's Pokémon ex score on the deck's Darkness Pokémon with damage from an attack. It covers the whole board including itself, it works from the Bench, and it doesn't stack. Everything in this deck is Darkness.

The trigger is exact. It needs damage, from an attack, from a Pokémon ex. It does nothing against single-Prize attackers, nothing against counters placed by Powerful Hand or Spiritual End, and nothing against counters moved by Munkidori. In those rooms the Mega is 3 Prizes with no upside, and it stays in the deck.

Grimsley's Move is the fastest way to it. From the deck's second turn, Grimsley's benches a Mega straight out of the deck with no Gastly and no Candy spent. That only works while a Mega is still in the deck, so when Grimsley's is the plan, Hilda leaves the Megas where they are. Two copies, one to play and one in case the first is prized or dies.

Void Gale does 230 for DarknessDarkness and moves an Energy to a Benched Pokémon. It is the finisher when no Gengar ex is up. Boss's Orders brings up a target, Switch brings in the Mega, one attachment arms it, and it swings. That line closed the Charizard game on Live. It doubles to 460 into anything weak to Darkness, the one number Chaotic Pain can't reach, because counters ignore Weakness.

The Cape makes it 450, the only body in the deck that survives Mega Zygarde's 400. Nothing survives Mega Brave at 540.

Toxelx4

Set
ME02: Phantasmal FlamesME02: Phantasmal Flames 067/094
Rarity
CommonCommon
Type
DarknessDarkness
HP
70
Stage
Basic
Weakness
FightingFighting ×2
Retreat
Colorless1
Tournament
OKlegal (Reg I)
Attack
DarknessCall for Family - Search your deck for up to 2 Basic Pokémon and put them onto your Bench. Then, shuffle your deck.
Attack
DarknessColorlessPlayful Kick (20)

Call for Family benches two Basic Pokémon from the deck for Darkness. It reaches Okidogi ex, which Poffin and Poke Pad can't.

Four copies. It is the 11th Basic that fixed the mulligan rate, the going-second opener when no dog showed up, and a 70 HP body that pays nothing under Concealment.

Toxtricityx2

Set
ME02: Phantasmal FlamesME02: Phantasmal Flames 068/094
Rarity
RareRare
Type
DarknessDarkness
HP
140
Stage
Stage 1
Ability
Sinister Surge - Once during your turn, you may use this Ability. Search your deck for a Basic Darkness Energy card and attach it to 1 of your Benched Darkness Pokémon. Then, shuffle your deck. If you attached Energy to a Pokémon in this way, place 2 damage counters on that Pokémon.
Weakness
FightingFighting ×2
Retreat
ColorlessColorless2
Tournament
OKlegal (Reg I)
Attack
DarknessDarknessColorlessGentle Slap (100)

Sinister Surge attaches a Basic Darkness Energy from the deck to a Benched Darkness Pokémon once a turn, and puts two damage counters on it. It is an Ability, so it works on turns the Supporter is busy elsewhere.

Two copies, and each Surges on its own; the card carries no "you can't use more than one" clause. Grimsley's and Poke Pad both find it, and it has no Candy clock, so it never needs the turn-1 search. Where the Energy goes covers the targets.

Trainers — Supporters

Lillie's Determinationx3

Set
ME01: Mega EvolutionME01: Mega Evolution 119/132
Rarity
UncommonUncommon
Type
Trainer - Supporter
Ability
Shuffle your hand into your deck. Then, draw 6 cards. If you have exactly 6 Prize cards remaining, draw 8 cards instead.
Tournament
OKlegal (Reg I)

It shuffles the hand into the deck and draws six, or eight while all six Prize cards remain. Three copies.

It comes down early for eight, with two exceptions the Live games taught. The first is a hand that already holds its line, which stays unshuffled. In the Charizard game, the opening hand had Gastly, Gengar ex, Dawn, Hilda, Toxtricity, and two Energy, and a turn-1 Lillie's pushed the first Chaotic Pain back a turn. The second is lethal. Lillie's shuffles away every card in hand along with the dead ones, so the check for lethal comes before the dig.

Lillie's went from four to three for the second Boss's Orders. Test and Tune has the fourth.

Grimsley's Movex2

Set
ME02: Phantasmal FlamesME02: Phantasmal Flames 090/094
Rarity
UncommonUncommon
Type
Trainer - Supporter
Ability
Look at the top 7 cards of your deck and put a Darkness Pokémon you find there onto your Bench. Shuffle the other cards and put them on the bottom of your deck. You can't use this card during your first turn.
Tournament
OKlegal (Reg I)

It looks at the top 7 cards of the deck and puts a Darkness Pokémon found there onto the Bench, and it can't be played on the first turn. Two copies, Phantasmal Flames 090, mark I. Both copies in the sleeve are the player's-choice stamped holos from the last two league nights, and those two prizes are why this card got a look at all.

It benches any stage. The ruling reads "you can place any stage of {D} Pokémon you find directly onto your bench" (Phantasmal Flames FAQ, TPCi Rules Team, 2025-11-13), and Live honors it. Every Pokémon in this list is Darkness, so it hits something about 94% of the time. What it hits is what matters.

It benches
Which means
Mega Gengar ex
Shadowy Concealment on turn 2, with no Gastly and no Candy spent
Toxtricity
a Surge the same turn, since it arrives on the Bench
Gengar ex
a second attacker, arriving empty; Surge and the turn's attachment arm it
Okidogi ex
the shield, when no dog opened
Haunter or Gastly
next turn's Gengar, or a fresh Candy target

The odds, and when to play it, are in Grimsley's Move odds. The six cards it passes over go to the bottom of the deck and stay there until something shuffles.

Dawnx2

Set
ME02: Phantasmal FlamesME02: Phantasmal Flames 087/094
Rarity
UncommonUncommon
Type
Trainer - Supporter
Ability
Search your deck for a Basic Pokémon, a Stage 1 Pokémon, and a Stage 2 Pokémon, reveal them, and put them into your hand. Then, shuffle your deck.
Tournament
OKlegal (Reg I)

It searches the deck for a Basic, a Stage 1, and a Stage 2 Pokémon. Two copies. One card sets up a whole line: Gastly, Haunter, and a Gengar, or Toxel, Toxtricity, and a Gengar.

Its Stage 2 pick is the matchup call, from Which Stage 2 gets the Candy. When Grimsley's is the plan for the Mega, Dawn takes Gengar ex and leaves the Mega in the deck.

Hildax2

Set
SV: White FlareSV: White Flare 084/086
Rarity
UncommonUncommon
Type
Trainer - Supporter
Ability
Search your deck for an Evolution Pokémon and an Energy card, reveal them, and put them into your hand. Then, shuffle your deck.
Tournament
OKlegal (Reg I)

It searches the deck for an Evolution Pokémon and an Energy card. Two copies. It is the Energy-in-hand card for the 26% of hands that open without one, and it reads Evolution Pokémon, which here is nine cards: two Haunter, three Gengar ex, two Mega Gengar ex, and two Toxtricity.

BoardHilda takesThen
a Gastly benched last turnGengar ex or the Mega, and an EnergyCandy, attach
a Toxel benched last turnToxtricity, and an Energythe Surge engine a turn early
a Gastly and a ToxtricityHaunter, and an Energyevolve, attach, Surge the Haunter, and it becomes a loaded Gengar next turn

It comes before the Candy. Hilda can change which Stage 2 the board wants.

Team Rocket's Petrelx2

Set
SV10: Destined RivalsSV10: Destined Rivals 176/182
Rarity
UncommonUncommon
Type
Trainer - Supporter
Ability
Search your deck for a Trainer card, reveal it, and put it into your hand. Then, shuffle your deck.
Tournament
OKlegal (Reg I)

It searches the deck for a Trainer card. Two copies. It makes every one-of behave like a two-of.

Same-turn targets are the Items, the Tool, and the Stadium: Rare Candy, Poke Pad, Switch, Energy Recycler, Hero's Cape, and Risky Ruins. The Supporters it finds wait for next turn: Grimsley's, Boss's Orders, AZ's, and Janine's. It is the only card that finds the Cape, and the fastest way to a Risky Ruins when their Stadium is the problem.

Against Team Rocket decks, their own Team Rocket's Factory draws two more cards whenever this deck plays Petrel. That won a turn in the Toxtricity Box game.

Janine's Secret Artx1

Set
SV: Shrouded FableSV: Shrouded Fable 059/064
Rarity
UncommonUncommon
Type
Trainer - Supporter
Ability
Choose up to 2 of your Darkness Pokémon. For each of those Pokémon, search your deck for a Basic Darkness Energy card and attach it to that Pokémon. Then, shuffle your deck. If you attached Energy to your Active Pokémon in this way, it is now Poisoned.
Tournament
OKlegal (Reg H)

It attaches a Basic Darkness Energy from the deck to each of up to two Darkness Pokémon, and Poisons the Active Pokémon if it took one. One copy, mark H.

It does three jobs in one Supporter. It Poisons a dog again after it left the Active Spot, which is worth 130 damage. It puts the second Energy on an Active Gengar that is one short, which Surge can't do. And it pulls two Energy out of the deck in a drought.

One Energy per Pokémon, never two on one. A judge confirmed it.

Boss's Ordersx2

Set
ME01: Mega EvolutionME01: Mega Evolution 114/132
Rarity
UncommonUncommon
Type
Trainer - Supporter
Ability
Switch in 1 of your opponent's Benched Pokémon to the Active Spot.
Tournament
OKlegal (Reg I)

It switches one of the opponent's Benched Pokémon into the Active Spot. Two copies, up from one.

Chaotic Pain does most of a gust's job for free. The reasons to drag are the ones counters can't cover:

  • Munkidori. It is weak to Darkness, so once it is Active any real attack kills it, even an un-Poisoned Chain-Crazed. The answer doesn't need a Gengar in play.
  • A target behind Battle Cage, which protects their Bench and nothing else.
  • The last Prize. A damaged body or a Pokémon ex on their Bench, for a dog or Void Gale.
  • An attacker they just loaded, stranded in the Active Spot.

AZ's Tranquilityx1

Set
ME04: Chaos RisingME04: Chaos Rising 076/086
Rarity
UncommonUncommon
Type
Trainer - Supporter
Ability
Switch your Active Pokémon with 1 of your Benched Pokémon. If you moved a Pokémon ex to your Bench in this way, heal 80 damage from that Pokémon.
Tournament
OKlegal (Reg J)

It swaps the Active Pokémon with a Benched one, and heals 80 from the one it moved if that one is a Pokémon ex. One copy, Chaos Rising 076, mark J.

Switch is the rotation on turns the Supporter slot is spoken for, and AZ's is the rotation on turns it isn't, or when the board needs one of the three things only AZ's does:

  • It works under Item lock. Budew's Itchy Pollen and Jellicent ex's Oceanic Curse turn off Switch and Rare Candy, and AZ's still moves.
  • It is the dog's exit. A dog that leaves by AZ's keeps its Energy and comes back 80 healthier.
  • It is the Mega's return ticket. The Mega swings Void Gale, takes the hit, and AZ's sends it home with Concealment still on.

Three misuses tempt everyone. AZ's on the attacker wastes the attacker unless the next one is loaded. AZ's on a Gengar ex that would die to the hit anyway throws away the coin, since standing flips and pulling doesn't. And AZ's over Lillie's on a bricked hand draws no cards.

Trainers — Items

Rare Candyx4

Set
ME01: Mega EvolutionME01: Mega Evolution 125/132
Rarity
CommonCommon
Type
Trainer - Item
Ability
Choose 1 of your Basic Pokémon in play. If you have a Stage 2 card in your hand that evolves from that Pokémon, put that card onto the Basic Pokémon to evolve it, skipping the Stage 1. You can't use this card during your first turn or on a Basic Pokémon that was put into play this turn.
Tournament
OKlegal (Reg I)

Four copies. Five Stage 2 cards sit over four Gastly, and Candy is the speed route. Two timing rules decide openings: never on the first turn, and never on a Basic that entered play this turn. The search comes first, then the Candy.

Buddy-Buddy Poffinx2

Set
SV05: Temporal ForcesSV05: Temporal Forces 144/162
Rarity
UncommonUncommon
Type
Trainer - Item
Ability
Search your deck for up to 2 Basic Pokémon with 70 HP or less and put them onto your bench. Then, shuffle your deck.
Tournament
OKlegal (Reg H)

Two Basic Pokémon with 70 HP or less, straight to the Bench. Gastly and Toxel are the targets. It is the only Item that benches two on turn 1, and the only way to fill the Bench going first. Two copies, mark H; Poke Pad is its April replacement.

Poke Padx2

Set
ME03: Perfect OrderME03: Perfect Order 081/088
Rarity
UncommonUncommon
Type
Trainer - Item
Ability
Search your deck for a Pokémon that doesn't have a Rule Box, reveal it, and put it into your hand. Then, shuffle your deck. (Pokémon ex, Pokémon V, etc. have Rule Boxes.)
Tournament
OKlegal (Reg J)

It searches the deck for a Pokémon without a Rule Box. Two copies, printed Poké Pad, Perfect Order 081, mark J, and reprinted in 30th Celebration.

It finds Gastly, Toxel, Haunter, and Toxtricity, never an ex. On the first turn it takes Gastly, because Gastly is the only card on a clock; later it takes whatever the line is missing. Together with the 11th Basic, it cut the chance of an empty Bench after the first turn from 34% to 22% going first, and from 10% to 6% going second.

Switchx2

Set
ME01: Mega EvolutionME01: Mega Evolution 130/132
Rarity
CommonCommon
Type
Trainer - Item
Ability
Switch your Active Pokémon with 1 of your Benched Pokémon.
Tournament
OKlegal (Reg I)

It swaps the Active Pokémon with a Benched one. Two copies. Retreat Costs are paid in Energy, and this board's are 3 and 2; Switch pays in a card instead. It also clears Poison, so it belongs to the ghosts, not to a Poisoned dog.

Energy Recyclerx2

Set
SV10: Destined RivalsSV10: Destined Rivals 164/182
Rarity
UncommonUncommon
Type
Trainer - Item
Ability
Shuffle up to 5 Basic Energy cards from your discard pile into your deck.
Tournament
OKlegal (Reg I)

It shuffles up to 5 Basic Energy from the discard pile back into the deck. Two copies.

Engine
Where it looks
Sinister Surge
deck
Janine's Secret Art
deck
Poisonous Musculature
deck, two at a time
Hilda
deck, to hand

Every engine searches the deck, so Energy in the discard pile is invisible to all of them. Knock Outs, retreats, and Crushing Hammer all bury it. On Live, one long game emptied the deck by turn 9 and Sinister Surge found nothing until Recycler put five back. Petrel finds one.

Trainers — Tool & Stadium

Hero's Capex1

Set
SV05: Temporal ForcesSV05: Temporal Forces 152/162
Rarity
ACE SPEC RareACE SPEC Rare
Type
Trainer - Pokémon Tool
Ability
The Pokémon this card is attached to gets +100 HP.
Tournament
OKlegal (Reg H)

The Pokémon this card is attached to gets +100 HP. The ACE SPEC, Temporal Forces 152, mark H.

Their biggest number decides it. The Cape only changes an outcome when their hit lands between the wearer's HP and that HP plus 100.

WearerHPSurvivesStill dies to
Gengar ex380Aura Jab with Premium Power Pro 320, Maximum Drilling 330, Drilling with Kieran 360, Corkscrew Dive with two boosts 320Gaia Wave 400, Mega Brave 540, Corkscrew with three boosts 380, Draconic Buster
Mega Gengar ex450everything above, Gaia Wave 400, Drilling with Maximum Belt and Kieran 410, and Corkscrew with three boosts 380Mega Brave 540, Draconic Buster
Okidogi ex350Jab with Pro 320, Drilling 330, Corkscrew with two boosts 320Drilling with Kieran 360, Gaia Wave 400, Draconic Buster

It goes on the Gastly that is about to get the Candy, since Tools are legal on the first turn and the Cape rides the evolution. Against Mega Zygarde it goes on the Mega instead; a Cape'd Gengar ex at 380 still dies to 400. Against Cynthia's Garchomp it goes on the dog in front, since nothing saves a Mega from Draconic Buster. Petrel is the only card that finds it.

Risky Ruinsx2

Set
ME01: Mega EvolutionME01: Mega Evolution 127/132
Rarity
UncommonUncommon
Type
Trainer - Stadium
Ability
Whenever any player puts a Basic non-Darkness Pokémon onto their Bench during their turn, place 2 damage counters on that Pokémon.
Tournament
OKlegal (Reg I)

Two damage counters on every Basic non-Darkness Pokémon either player benches. Every Pokémon here is Darkness, so it is completely one-sided. The 20 stays through evolution, which is what puts Alakazam and Crustle inside one Chaotic Pain.

Two copies, because Stadiums are the other half of its job. A Stadium only leaves play when another replaces it, and a Stadium can't be played over one with the same name.

Their StadiumWhat it does to the deckWhen to replace it
Battle Cagestops Chaotic Pain on their Benchwhen the snipe is needed; Charizard decks replay it, so the second copy waits
Forest of VitalityWeedle to Beedrill ex in one turnat every chance; it is a tax, not a lock, since they run four
Spikemuth Gymsearches their Marnie's Pokémon every turnthe turn after they build
Ange FloetteMega Floette ex at 400before the swing at it; it drops back to 250
Gravity Mountainevery Stage 2 in play gets 30 less HPthe turn before their big hit, not the turn it lands
Jamming Towerthe Cape stops workingthe turn the Cape needs to work
Full Metal Labthe dogs and Void Gale do 30 less to Metal Pokémon; counters ignore itthe turn a hit needs the 30
N's Castle, Prism Tower, Team Rocket's Factoryfree retreats and extra drawswhen nothing above is in play

Energy

Basic Darkness Energyx10

Set
MEE: Mega Evolution Energies 7
Rarity
CommonCommon
Type
Energy - Basic
Tournament
OKlegal

Ten, and the count is deliberately lower than it looks. Poisonous Musculature, Sinister Surge, and Janine's all search the deck, so the only Energy that needs to be in hand is the one manual attachment per turn. Two Energy Recycler and two Switch keep ten honest. Any Basic Darkness print works, holos included.

The Thesis

The format runs on Mega Evolution Pokémon ex. They carry 330 to 380 HP, they hit for 270 and up, and nothing in this deck wins a straight damage race against one. The deck does not try. It kills them before they exist.

Chaotic Pain costs DarknessDarkness and places 13 damage counters on 1 of the opponent's Pokémon. Any one they have, Active or Benched. Placing counters is not dealing damage, and most of what matters about this card follows from that one distinction.

Almost every Mega grows out of something, and 130 kills nearly all of those somethings.

Their MegaGrows fromHPOne Chaotic Pain
Mega Lucario exRiolu80✓
Mega Excadrill exDrilbur70✓
Mega Starmie exStaryu70✓
Mega Greninja exFroakie, Frogadier70, 100✓
Mega Charizard X exCharmander80✓
Mega Venusaur exBulbasaur, Ivysaur80, 110✓
Mega Gardevoir exRalts, Kirlia70, 100✓
Mega Chandelure exLitwick, Lampent70, 90✓
Dragapult exDreepy, Drakloak70, 90✓
Beedrill exWeedle, Kakuna50, 80✓

A few Megas grow from nothing. Mega Zygarde ex, Mega Floette ex, and Mega Kangaskhan ex are Basics, and those rooms are won by the Prize tax, not the snipe.

The thesis has limits, and they are arithmetic. One Pain a turn can't keep up with a deck that benches four cradles on turn 1 and searches two more every turn, which is Mega Excadrill. Going second, it can't reach a Stage 1 Mega that evolves on the opponent's second turn, which is Mega Starmie and Mega Lucario. And it finds nothing to shoot when Forest of Vitality takes Weedle all the way to Beedrill ex on the turn it lands. Versus the Card Shop has the plan for each.

Very little stops the counters. Damage prevention in this format is worded as damage, and counters walk through it. The Tera rule on Dragapult ex's Bench, Cornerstone Mask Ogerpon ex, Crustle's Mysterious Rock Inn, Neutralization Zone, and Full Metal Lab all miss. Four things do stop them, and each has a way around:

Stops Chaotic PainHowAround it
Hide 'n' Sneak on Poltchageist, Sinistcha, and Banetteprevents every effect of the deck's attacks on that Pokémon, and placing counters is an effectattack damage is not an effect, so the dogs and Void Gale get through
Rocky Fighting Energythe same, on the Fighting Pokémon it is attached toshoot something else; Mega Zygarde and Cynthia's Garchomp carry it, and Draconic Buster discards Garchomp's own
Mist Energythe same, on any Pokémon it is attached toCrustle and Mega Kangaskhan carry it; Crustle's Rock Inn stops only Pokémon ex, so Toxtricity and Haunter still hit it
Battle Cageno counters on their Benched PokémonRisky Ruins replaces it, or Boss's Orders drags the target up

The other half of the deck is the price of dying. Shadowy Concealment takes a Prize off every Knock Out an opposing Pokémon ex scores on the deck's Darkness Pokémon, and Fainting Spell flips a coin at whatever kills a Gengar ex. Between them, the deck's losses cost one Prize while theirs cost two or three.

AttackerCostOutputPrizes it gives up
Gengar ex, Chaotic PainDarknessDarkness130 as counters, any target1
Mega Gengar ex, Void GaleDarknessDarkness230, and 460 into Darkness Weakness2
Okidogi ex, Chain-CrazedDarknessDarknessColorless260 while Poisoned, 520 into Darkness Weakness1

The Prize column assumes Mega Gengar is on the Bench and their attacker is a Pokémon ex. Against a single-Prize attacker, or counters moved by an Ability, add one to every row.

The Hard Rules

Every Live loss with this deck traces back to one of these. Each has a number behind it. The card sections above explain the cards; this section explains the decisions.

Which Stage 2 gets the Candy

They attack withBuild firstWhy
Pokémon ex and MegasMega Gengar ex, parked on the BenchShadowy Concealment takes a Prize off every Knock Out their ex scores. Against Mega Zygarde it would have turned their 6 Prizes into 2.
Mega Lucario ex, with three Boss's OrdersGengar ex, under the CapeMega Brave kills anything, and a parked Mega is 2 Prizes they can drag up and take. The Mega comes only when Haunter hands it over free.
Cynthia's Garchomp exMega Gengar ex, parked, but the Cape goes on the Pokémon in frontConcealment still pays against an ex attacker. Draconic Buster does 640 to a Mega either way, so the Cape goes on a body it can save.
Single-Prize attackersGengar ex and the dogs, never the MegaConcealment never applies, so the Mega is 3 Prizes for nothing. One dragged-up Mega lost the Dhelmise game.
Munkidori on their BenchGengar ex firstMoved counters skip Concealment and Fainting Spell, and Chaotic Pain is what kills Munkidori.

Four more rules sit under the table:

  • Search before the Candy. Play Dawn, Hilda, and Petrel first, then pick the Candy's target. The Zygarde loss spent its Candy on a Gengar ex one card before Hilda brought the Mega.
  • One Mega on the board, never two. Concealment doesn't stack, so a second one is two more Prizes in the open for nothing.
  • Grimsley's can't reach the hand. It only looks at the deck. Once both Megas are in hand, the only route left is a Gastly that has sat a turn plus a Rare Candy, so think twice before Hilda pulls a Mega that Grimsley's could have benched.
  • Haunter is the safe step. When a Gastly is exposed and the Candy has no good target yet, Haunter takes it to 100 HP, stays one Prize, and becomes Gengar ex next turn without a Candy.

Where the Energy goes

Rule
Why
Musculature takes both Energy, every time.
It reads "up to 2". Against Crushing Hammer, the spare is what keeps Chain-Crazed live after a heads.
Surge the next attacker, and prefer a body that shrugs off 20.
A benched dog (250) or the parked Mega (350) takes Surge's counters without changing a breakpoint. A benched Haunter is the classic target, because it evolves into a Gengar ex already holding Darkness.
Against Fighting and Metal, feed the dogs and never the ghosts.
Surge's 20 turns a 280 Gengar ex into a 260 one, and a bare Aura Jab into Fighting Weakness is exactly 260. So is a Corkscrew Dive with one Roserade or Premium Power Pro. Against Mega Excadrill, a Surged Mega Gengar is exactly 330.
With nothing to feed, Surge a benched Toxtricity onto itself.
Opponents drag Toxtricity up to strand it. Energy it banked on the Bench pays its own Retreat Cost of 2. Once it is Active, it can't Surge itself; Live used to allow that, and a September 2026 update fixed it.
Against Bench damage and counter-multipliers, Surge only what attacks this turn.
Jetting Blow's 50 plus Surge's 20 is a dead Gastly. Spiritual End quadruples counters already on the board, and Matcha Spin adds four to everything.
Janine's is how an Active Gengar gets its second Energy.
Surge never reaches the Active Spot. Janine's reaches any two Darkness Pokémon, Active or Benched, and Poisons the Active only if it took an Energy.
Retreat is Energy.
Retreat Costs are paid in Energy, 3 for a dog and 2 for either Gengar or Toxtricity. One Live game burned 7 Energy on retreats. Count every retreat as a self-inflicted Crushing Hammer, and use Switch or AZ's.

Who Chaotic Pain hits

OrderTargetsWhy
1Munkidori (110), Froslass (90)They move or place counters, which switches off Concealment and Fainting Spell and undoes damage already dealt.
2The Basic or Stage 1 their Mega grows fromA Mega they can't deploy is three Prizes stuck in their hand. The table in The Thesis has every one.
3Draw, search, and Energy engines: Lunatone (110), Dunsparce (60 or 70), Metang (100), Kadabra (80), Cynthia's Gabite (100)Cut the fuel and their big attacker arrives late or not at all.
4Eevee, before it becomes EspeonMiraculous Shine devolves every evolved Pokémon the deck has in play.
  • Read the Ability before picking a target. One Live loss came from a turn-2 Chaotic Pain into a Poltchageist, which ignores it. The Eevee beside it was a free Prize, and the game ended one Prize short.
  • It can't touch Poltchageist, Sinistcha, or Banette, any Fighting Pokémon holding Rocky Fighting Energy (a Garchomp that just used Draconic Buster has discarded its own), anything holding Mist Energy, Misty's Magikarp on their Bench, or anything on their Bench while Battle Cage is in play.
  • It can't one-shot Mew ex (160), Dhelmise (140), Fezandipiti ex (210), a healthy Stage 2 ex, or any Cynthia's Pokémon wearing Cynthia's Power Weight (+70). Alakazam (140) dies to it only after a Risky Ruins chip on the Abra. Crustle (150, or 170 with Growing Grass Energy) needs a chip too, and Haunter's Spooky Shot for 40 covers either.
  • Counters ignore Weakness. Against a Darkness-weak target, a dog or Void Gale doubles and Chaotic Pain doesn't.

When to stand and when to pull

The bodyTheir next hitDo this
A damaged Gengar exkills it, and their attacker is a Pokémon exStand and die. With the Mega down it costs 1 Prize, and Fainting Spell flips at something worth 2 or 3.
Gengar ex under the Capeleaves it aliveAttack, take the hit, then AZ's it home for 80 with the Cape still on.
A damaged Gengar exany hit from a single-Prize attackerAZ's it, if 80 keeps it alive. The coin is only for 1 Prize and Concealment pays nothing.
An Okidogi ex that dies either wayreaches the Bench tooSwing on the way out. Cruel Arrow, Phantom Dive, and Munkidori all reach the Bench, so retreating a doomed dog costs 3 Energy and an attack for nothing.
Mega Gengar exanythingActive only for Void Gale, then AZ's it back to the Bench.

Opening turns

When
Do this
Setup
Lead Okidogi when the hand has one. Bench every Gastly and Toxel in hand.
First turn
Poke Pad and Poffin take Gastly first. Rare Candy needs it to have sat a turn, and Toxtricity and Haunter have no such clock. Grimsley's can't be played.
First turn, going second
With a dog, attach, use Poisonous Musculature, and take both. With a Toxel, Call for Family for two Gastly or a dog. Play Lillie's for 8 only when the hand doesn't already hold its line.
First turn, going first
Items only. The Cape goes on the Gastly slated for the Candy if their first Basic is Fighting or Metal.
Second turn
Grimsley's comes online. Search first, then Candy.
Every turn
Check for lethal before digging. Lillie's shuffles away the whole hand.
Against Judge, Special Red Card, or Unfair Stamp
Bench Pokémon as they're drawn. The Bench can't be shuffled away.

Grimsley's Move odds

Targets left in the deck45 cards left35 cards left25 cards left
229%36%49%
341%50%65%
450%61%76%
559%70%84%
666%77%90%

That is the chance the top seven holds at least one target. Playing it later helps only because the deck is smaller, and pulling targets out first hurts it. If Dawn or Hilda already put two Stage 2s in hand, a turn-2 Grimsley's drops from about 59% to about 41%.

  • Count before playing it. A hit is Mega Gengar, Gengar ex, Toxtricity, or an Okidogi or Haunter when that is what the board is missing. With four or fewer left early, play a different Supporter.
  • Play it before the Items that pull its targets out. Grimsley's first, then Poke Pad for whatever it missed.
  • A miss buries six cards on the bottom of the deck. The next Surge, Poffin, Poke Pad, or Petrel shuffles them back in.
  • For one exact card, use Petrel, Dawn, or Hilda. Grimsley's is a roughly 60% card, built for the turns when any of several Pokémon will do.

The Prize Tax

Shadowy Concealment decides how the Bench gets built, so the arithmetic is worth doing.

Board, against a Pokémon ex attacker
What it pays them
Mega Gengar ex, Gengar ex, Okidogi ex, Toxtricity, Gastly
2 + 1 + 1 + 0 + 0 = 4
Gengar ex, Okidogi ex, Toxtricity, Gastly, with no Mega
2 + 2 + 1 + 1 = 6, the whole game
Mega Gengar ex, two Gengar ex, Okidogi ex, Toxtricity
2 + 1 + 1 + 1 + 0 = 5
Two Mega Gengar ex, two Gengar ex, Okidogi ex
2 + 2 + 1 + 1 + 1 = 7

Every benched Pokémon ex is a hole in the tax. Keep one Mega on the board, at most two other ex, and zero-Prize bodies everywhere else.

Stand and die

Cost of letting a Gengar ex die, with the Mega on the Bench
1 Prize
Chance Fainting Spell Knocks Out the attacker
50%
What that attacker is usually worth
2 or 3 Prizes

That is about one Prize of expected value per death, in the deck's favor. On Live the coin took a Mega Zygarde, a Mega Floette, and a Dhelmise. Retreating throws away both halves and costs Energy on top.

The Energy Engine

Six sources put Energy where it matters, and only the manual attachment spends a card from the hand.

SourceFromToCosts
Manual attachmenthandanywherethe attachment for the turn
Poisonous Musculaturedeck, twothe Active dogits attack; Poisons it
Sinister Surgedecka Benched Darkness Pokémon, once per Toxtricitytwo damage counters
Janine's Secret Artdeck, one eachup to two Darkness Pokémonthe turn's Supporter; Poisons the Active if it took one
Void Galethe Megaa Benched Pokémonnothing extra; it rides the attack
Hildadeckthe handthe turn's Supporter

Chaotic Pain and Void Gale cost two, which the engine reaches in one turn. Chain-Crazed costs three, which Musculature delivers on its own a turn ahead.

Four things drain the pool. Knock Outs bury whatever the Pokémon held. Retreat Costs bury 3 from a dog and 2 from a Gengar or Toxtricity. Crushing Hammer buries one on every heads, and Toxtricity Box runs four. Musculature pulls two out of the deck at a time. Switch and AZ's keep the retreat bill off the pool, and Energy Recycler puts the rest back where the engines look.

Against Crushing Hammer, the spare matters. A dog with four Energy still swings after one heads; a dog with three doesn't.

Game Plans

1. Turn one, going second

Going second, the deck can attack on its first turn, and it has two openers.

With a dog and an Energy, which 22% of hands hold, attach, use Poisonous Musculature, and take both. The dog ends the turn holding three and Poisoned, and turn 2 is Chain-Crazed for 260.

With a Toxel instead, attach and Call for Family. Take two Gastly when a dog is already in play, or a dog and a Gastly when it isn't.

Either way, bench a Gastly, because turn 1's Gastly is turn 2's Gengar. Play Lillie's while it still draws eight, unless the hand already holds its line. Grimsley's can't be played yet.

2. Turn one, going first

No attack, no Supporter, and no Grimsley's, but every Item is still legal. Poffin and Poke Pad take Gastly first. If their first Basic says the room is Fighting or Metal, the Cape goes on the Gastly slated for the Candy. A Hilda or a Dawn in the opening hand is turn 2's play, and it goes down before the Candy does.

3. Rearming after a knockout

The attacker dies. The question is whether the next one is ready.

If one is, promote it. A Haunter that Surge fed evolves into a Gengar ex already holding Energy. A benched dog with Energy on it comes up swinging.

If a Gengar ex is Active and one Energy short, the out is Janine's. Surge can't reach the Active Spot, and Janine's puts one Energy on the Active and one on the Bench. Play it instead of passing with a loaded Gengar doing nothing.

If nothing is ready, send out a dog. It needs no line and no Candy. One Energy and Musculature give it three and a Poison, and 250 HP buys the turn the ghosts need.

Use Switch or AZ's, not Retreat. Rotating by retreat discards Energy equal to the Retreat Cost, and this board's costs are 2 and 3.

4. Getting the Mega down

Against Pokémon ex attackers, the Mega is due before anything on the board takes a real hit. There are three routes, fastest first.

  1. Grimsley's Move, from the second turn. Straight from the deck to the Bench, with no Gastly or Candy spent. Count the targets first; the odds table has the numbers.
  2. Rare Candy on a Gastly that has sat a turn. Search first, so the Candy goes on the right Stage 2.
  3. Haunter, the turn after. Slow but free, and a benched Haunter can take a Surge on the way.

Keep one Mega in the deck while Grimsley's is the route. A Mega in hand needs a Gastly and a Candy. The Zygarde loss had both Megas in hand by turn 3 and no Gastly to put them on.

The exceptions are in Which Stage 2 gets the Candy. Never build it against single-Prize attackers, build Gengar ex first against Munkidori, and build the Cape'd Gengar ex first against Mega Lucario.

5. When the dog gets gusted

They drag a Gastly into the Active Spot. The dog is on the Bench with its Energy and without its Poison, and it costs three Energy to retreat.

Often, do nothing. The Gastly dies for zero Prizes under Concealment, and the dog comes back up next turn having lost only the Poison.

When waiting isn't an option, use Switch or AZ's, never Retreat. Then Janine's restores the Poison, and Chain-Crazed is 260 again.

When the dog itself is doomed, swing with it. A dog that retreats to the Bench still dies there to Cruel Arrow, Phantom Dive, or Munkidori, and it paid three Energy for nothing. The Toxtricity Box game retreated a Poisoned dog holding four Energy instead of hitting their 120 HP Scrafty for 260, and the dog died on the Bench a turn later.

6. Choosing the stadium

Two Risky Ruins, and Petrel works like a third, so the question is usually when, not which. Risky Ruins has the table of what to replace.

7. Bench discipline

Keep the board's payout at four or less against ex attackers.

8. When the Cape goes on

The Cape is one card and one use, so the question every game is which body and which turn.

Read their biggest number first. Under 280, hold it; the Gengar survives on its own. Between 280 and 379, it goes on the first Gengar through the Gastly, because Jab with Pro at 320, Drilling at 330, and Drilling with Kieran at 360 all fall in that band. From 380 up, a Gengar dies either way, so the Cape goes on the Mega at 450 or stays in the deck. Mega Zygarde's 400 is the case that decides it.

Then pull it, don't spend it. A Cape'd Gengar at 60 after a Jab is one AZ's returns to the Bench at 140, with the Cape still on.

Versus the Card Shop

The Live ladder is where this deck practices, and league is where it plays. Shares below come from Limitless Play online tournaments since 30th Celebration went legal, pulled 2026-09-25. Gengar ex decks there sit at 0.65% of the field with a 38% win rate, and they do worst against Alakazam (18%), Crustle (14%), Mega Excadrill (17%), and Dragapult (about 30%). The samples are small, and none of those lists run the dogs.

Three kinds of room decide the build.

RoomExamplesBuildThe edge
Pokémon ex attackersDragapult, Lucario, Zygarde, Garchomp, Excadrill, N's Zoroark, Starmie, Floette, Cinccino, CharizardMega first, then Gengar exConcealment and Fainting Spell both work
Single-Prize attackersDhelmise, Alakazam, Slowking, Crustle, Baby BoxGengar ex and the dogs, no Megathe Psychic ones are weak to Darkness, and the dogs one-shot them
Counter moversMunkidori in Dragapult, Grimmsnarl, Sharpedo, and Toxtricity Box; Alakazam; Spiritual EndGengar ex firstChaotic Pain on the movers
DeckShareSection
Dragapult ex, every build~19%, and Steve most weeks at leagueVersus Dragapult ex
Alakazam, both builds~7.5%Versus Alakazam
N's Zoroark ex6.1%Versus N's Zoroark ex
Slowking6.1%The rest of the room
Basic Box4.8%The rest of the room
Mega Excadrill ex4.5%, and Matt every week at leagueVersus Mega Excadrill ex
Cynthia's Garchomp exElliott, every week at leagueVersus Cynthia's Garchomp ex
Mega Lucario ex, both builds3.9%Versus Mega Lucario ex
Dhelmise3.9%Versus Dhelmise
Crustle3.1%, and common at leagueVersus Crustle
Sharpedo Toxtricity2.0%, and Steve at leagueVersus Mega Sharpedo ex
Mega Starmie ex, three builds1.6%Versus Mega Starmie ex
Marnie's Grimmsnarl ex1.5%Versus Marnie's Grimmsnarl ex
Beedrill ex0.8%Versus Beedrill ex
Toxtricity Box0.6%Versus Toxtricity Box
Cinccino ex0.2%, and seen at leagueVersus Cinccino ex
Mega Zygarde ex, Mega Floette ex, Charizard, Igglybuff Baby Boxon the Live ladderZygarde, Floette, Charizard, Baby Box

Versus Dragapult ex

Their number
The answer
Phantom Dive: 200 to the Active, and 6 counters across the Bench
Gengar ex at 280 survives the 200. The 6 counters kill a 70 HP Basic that already carries a Surge.
Dreepy 70, Drakloak 90, Munkidori 110, Budew 30
one Chaotic Pain each
Dragapult ex, 320 HP
two dog swings, or Void Gale plus a Pain

Steve plays this most weeks at CardCrate, and dragons.md is modeled on his list.

  • The Tera rule doesn't stop counters. Their Bench immunity is worded as damage, so Chaotic Pain reaches Dreepy and Drakloak wherever they sit.
  • Munkidori first, Budew second. Itchy Pollen locks the deck's Items for a turn, and AZ's is the rotation that still works under it.
  • Mega first. Every attacker they have is a Pokémon ex, so Concealment and Fainting Spell both work.
  • Bench small Basics only when they evolve next turn. Phantom Dive's counters are aimed at them, and counters placed that way skip Concealment.
  • Crushing Hammer is in most lists. Take both from Musculature, and hold a Recycler.

Versus Mega Lucario ex

Their number
The answer
Aura Jab: 130 for one Energy, 260 into Fighting Weakness, 320 with Premium Power Pro
the Cape'd Gengar ex at 380 survives it
Mega Brave: 270 for two Energy, 540 into Fighting Weakness, never two turns running
nothing survives it; stand and die for the coin
Riolu 80, Lunatone 110, Solrock 110
one Chaotic Pain each
  • Kill every Riolu, and the Mega never arrives.
  • This is the one ex room where the Mega waits. They run three Boss's Orders and a 540 attack, so a parked Mega is 2 Prizes they can drag up and take. Build the Cape'd Gengar ex first, and take the Mega only when Haunter hands it over.
  • Don't Boss while a Lucario that just used Mega Brave is Active. Sending it to the Bench wipes the lockout, and Air Balloon brings it back fresh.
  • Gravity Mountain takes 30 off every Stage 2. Replace it the turn before the Jab, not the turn it lands.
  • Judge is common here. Bench Pokémon as they're drawn.

Versus Mega Zygarde ex

Their number
The answer
Gaia Wave: 200 for three Energy, 400 into Fighting Weakness, and 30 less damage to it next turn
everything dies to it except a Cape'd Mega Gengar at 450
Rocky Fighting Energy
Chaotic Pain can't touch the Zygarde holding it
Mega Zygarde ex, a 310 HP Basic
Chain-Crazed for 260 plus anything, or Fainting Spell
Lunatone 110, Solrock 110, Binacle into Barbaracle, which attaches from hand every turn
Chaotic Pain on the draw and the Energy
  • Mega first, and the Cape goes on it. Every Knock Out they took in the Live loss would have cost one Prize less, and their 6 would have been 2. A Cape'd Gengar ex at 380 still dies to 400.
  • Search before the Candy. That game's Candy went on a Gengar ex one card before Hilda brought the Mega.
  • Fainting Spell is live. It took a 3-Prize Zygarde in that game.
  • Nullifying Zero costs five Energy and flips a coin for each Pokémon on the deck's side, 150 on every heads. It is their late-game Bench wipe, and a small Bench limits it.

Versus Cynthia's Garchomp ex

Their number
The answer
Corkscrew Dive: 100 for one Energy, and they draw to 6
200 into Fighting Weakness, and every Roserade or Premium Power Pro adds 60 more
Draconic Buster: 260 for two Energy, then every Energy on it is discarded
520 or more into Fighting Weakness, so nothing survives it. He runs no Neo Upper, so a Garchomp that Busters can only Corkscrew next turn.
Garchomp ex: 330 HP, 400 under Cynthia's Power Weight, Retreat 0
nothing one-shots it
One Rocky Fighting Energy, and one Battle Cage
Chaotic Pain can't touch the line holding the Rocky, or anything on his Bench while the Cage stands
Cynthia's Power Weight, four copies: +70 HP on any Cynthia's Pokémon
Chaotic Pain kills only what's bare. A Weighted Roserade is 200, a Gabite 170, and a Gible or Roselia 140.
Cynthia's Spiritomb: Raging Curse does 10 for every counter on their Benched Cynthia's Pokémon, for Colorless, ignoring Weakness
every counter left on their Bench comes back at the deck, from a single-Prize attacker that skips Concealment
Roserade 130, Gabite 100, and Gible, Roselia, and Spiritomb at 70, with no Weight and no Rocky
one Chaotic Pain each

This is Elliott's deck, the one he brings to Wednesday league every week, and cynthia-garchomp.md models his own list card for card. It is the hardest room this deck plays. Every Pokémon in the list is weak to Fighting, his attack costs one Energy and refills his hand while it hits, and nothing here one-shots a Garchomp. The full plan against it, written for the Blissey build, is in Lucky Haunt; most of it holds here.

Where Corkscrew Dive lands. Roserade and Premium Power Pro each add 30 before Weakness, so each one is 60 more on this deck.

BoostsDamageStill standing
None200Okidogi, Gengar ex, Mega Gengar
One260Gengar ex, Mega Gengar, a Cape'd Okidogi
Two320Mega Gengar, a Cape'd Gengar ex or Okidogi
Three380only a Cape'd Mega Gengar

Two-turn Knock Outs on a Garchomp. Nothing kills one in a single hit, so every Garchomp costs the deck two attacks, and the pair gets picked before the first swing.

The two hitsTotalBare, 330Weighted, 400
Chain-Crazed twice520✓✓
Chain-Crazed and Void Gale490✓✓
Chain-Crazed and Chaotic Pain390✓ten short
Void Gale and Chaotic Pain360✓✗
Chain-Crazed and Gentle Slap360✓✗

Chaotic Pain only lands once a Buster has thrown away the Rocky. A Risky Ruins chip on the Gible it grew from adds 20, which turns the 390 into a Knock Out on a Weighted Garchomp.

  • Read the Tool before picking a Chaotic Pain target. A Weighted Roserade survives it with 70 to spare, and a Weighted Gabite with 40. A Weight on a Roserade means Elliott has read the snipe.
  • Chaotic Pain order: Spiritomb once counters sit on their Bench, then a bare Roserade, then a bare Gabite. Spiritomb is Darkness, so Rocky can't protect it, and it is the one card in their list that turns the deck's damage against it. With both Roserades gone, Corkscrew is 200, and a Gengar ex survives it even with Pro. Gabite comes next, because Champion's Call fetches their next Garchomp.
  • Finish every Garchomp. It retreats for free. One left at 70, or 140 under a Weight, steps back to the Bench, and its counters become Raging Curse damage. One Chain-Crazed leaves 26 counters, which is 260, or 320 with two Roserades, and 320 kills a Gengar ex with no Concealment discount. Swing at a Garchomp when the second hit is ready or Spiritomb is gone, and Boss's Orders brings a retreated one back up.
  • Lead with Risky Ruins, and kill the Spiritomb. Ruins puts 2 counters on every Gible and Roselia they bench during their turn, and the counters ride the evolution. A Weighted Gible or Roselia under Ruins dies to one Pain, and a Garchomp grown from a chipped Gible falls to Chain-Crazed plus a Pain. Every one of those counters also adds 10 to Raging Curse, so Ruins and a live Spiritomb don't mix. His one Battle Cage replaces the Ruins; hold the second for it, and once the Cage is gone it can't come back.
  • Make them use Draconic Buster. Corkscrew is cheap and draws them cards; Buster throws away every Energy, Rocky included, and Chaotic Pain can reach that Garchomp until they attach another Rocky.
  • The Mega is a Boss's Orders magnet, and that's fine. He runs three Boss's Orders, and Meowth ex, Petrel, and Larry's Skill each find one, so expect the Mega dragged up for a Buster the first turn they can afford it. That costs them a Boss and both Energy, Rocky included, for 2 Prizes, the same 2 a Gengar ex costs with no Mega down, and every Knock Out before it was a Prize cheaper. Spiritomb's Knock Outs never get the discount.
  • The Cape goes on the ex in front, usually the dog. Going second with a dog in front, turn-1 Petrel takes the Cape. A bare Okidogi dies to a one-boost Corkscrew and takes three Energy with it. A Cape'd one lives through two boosts and hits back for 260, which leaves a bare Garchomp at 70 and a Weighted one at 140. Never Cape the Mega here, since Buster kills it either way.
  • Stand and die with Gengar ex. Fainting Spell is an Ability, so Rocky doesn't stop it. Heads takes a Garchomp for 2 Prizes.
  • Surge the dog or the Mega, never a Gengar. Surge's 20 turns a one-boost Corkscrew into a Knock Out on a Gengar ex.
  • Hold Boss's Orders for a Knock Out. Everything they run retreats for one or nothing, so dragging a body up to strand it does nothing. Boss a bare Roserade into a dog, or bring back a retreated Garchomp the deck can finish.
  • Put Energy only on something that will attack. Six Energy died on bodies that never swung in the Live loss. If the Mega holds one Energy when the Active falls, promote it and Janine's it to two. Void Gale leaves a bare Garchomp at 100 and a Weighted one at 170, and a Poisoned Mega at 340 survives a two-Roserade Corkscrew.
  • Meowth ex is 2 Prizes on a plate. It is 170, Colorless, and takes no Weight or Rocky. Boss's Orders brings it up into Void Gale or a Poisoned dog.
  • Special Red Card is live once you're at 3 Prizes or fewer. Bench Pokémon as they're drawn.

Versus Mega Excadrill ex

Their number
The answer
Maximum Drilling: 200 with three Energy, 330 with five
the Mega at 350 and a Cape'd Gengar ex at 380 both survive 330
Metang 100: Metal Maker attaches Energy off the top of their deck, once per Metang
Chaotic Pain the Metang before the Drilbur
Genesect ex 220: Metallic Signal searches two Metang or Megas a turn
Boss's Orders and a dog; 260 kills it even through Full Metal Lab
Full Metal Lab: their Metal Pokémon take 30 less damage
counters ignore it, and Risky Ruins replaces it
Precious Trolley benches four Basics on turn 1
too many cradles for one Pain a turn; this is a tax room

This is Matt's deck, the one he plays at Wednesday league every week, and it is the older build: Metang's Metal Maker is the Energy engine and Genesect ex is the search. A model of it is metal-excadrill.md. It feels fast because Trolley and Metallic Signal put two or three Metang up by his second turn, so Drilling can hit 200 that turn and 330 the next. Online, the newer Steven's build is the one that mostly shows up, and online lists add Kieran (360) or Maximum Belt (380). Matt's copy runs neither, so his ceiling is 330.

  • His order is Trolley, Genesect, then Metal Maker. Trolley benches two Drilbur, a Genesect ex, and Beldum. Metallic Signal fetches the Stage 1s early, and Metal Maker loads each Excadrill to five. Metagross is situational, his last resort.
  • Metal, not Fighting, so Weakness never applies. Every number above lands at face value.
  • Three bodies in this deck stand above 330: Mega Gengar at 350, a Cape'd Gengar ex at 380, and a Cape'd Okidogi at 350. Each one costs him two attacks.
  • Mega first, with no Cape and no counters on it. It already clears 330, so the Cape goes on the first Gengar ex. One Surge on the Mega leaves it at exactly 330.
  • At three Energy, Drilling is 200, and every ex in the deck survives it. Killing Metang keeps it there.
  • A dog plus Chaotic Pain kills the Excadrill. 260 plus 130 clears 340 even under the Lab, where the dog does 230. Void Gale plus a Pain only gets there once the Lab is gone.
  • Metagross is his last resort, and it pays nothing to Concealment. It is single-Prize and hits 330 with a Brave Bangle. A dog or Void Gale kills it through the Lab.
  • Online Gengar ex decks went 1-5 here. The Cape is why this list should do better.

Versus Alakazam

Their number
The answer
Powerful Hand: 2 counters on the Active per card in their hand, from a 140 HP Stage 2 with no Rule Box
a race; neither Concealment nor Fainting Spell ever applies
Alakazam 140, Kadabra 80, Abra 50, all weak to Darkness
an un-Poisoned Chain-Crazed doubles to 260; Chaotic Pain kills Abra and Kadabra, and Alakazam after a Ruins chip
Dunsparce into Dudunsparce, their draw
Chaotic Pain the Dunsparce
  • No Mega. It is 3 Prizes against an attacker Concealment never touches.
  • The dogs are the attackers here. Darkness Weakness makes every swing a Knock Out.
  • Their damage is their hand size. Unfair Stamp answers it directly, and it sits in Alternatives for when this room keeps winning.
  • Online Gengar ex decks went 2-8 here. The dogs are the difference.

Versus N's Zoroark ex

Their number
The answer
Night Joker copies a Benched N's Pokémon's attack for two Energy; N's Zekrom's Rampaging Thunder is 250
Gengar ex at 280 survives 250
Binding Mochi adds 40 while the Zoroark is Poisoned, and Pecharunt ex's Subjugating Chains supplies the Poison
290, which kills a Gengar ex or a dog
Black Belt's Training adds 40 more
330; a Mega Gengar at 350 survived it on Live

Target order, from the Live win:

  1. Zorua, before it evolves.
  2. N's Zekrom, the 250 that Night Joker copies. They'll bring it back with Night Stretcher; kill it again.
  3. Pecharunt ex, 190 HP and 2 Prizes. Without its Poison, Mochi does nothing, and Gengar ex lives through every hit.

A turn-2 Mega won that game. Concealment held them to 5 Prizes. Special Red Card comes out the moment the deck has 3 Prizes left, so the hand needs to be spent before then.

Versus Marnie's Grimmsnarl ex

Their number
The answer
Punk Up attaches up to five Energy when it evolves; Shadow Bullet is 180, plus 30 to the Bench
Gengar ex and the dog both survive one; neither survives two
Munkidori, up to three, each moving 3 counters a turn
9 counters a turn that skip Concealment and Fainting Spell
Froslass puts 1 counter on every Pokémon with an Ability, every Checkup
Toxtricity, Gengar ex, and Mega Gengar all have one
  • Kill order: Munkidori, then Froslass, then Grimmsnarl. Damage on Grimmsnarl doesn't stick while a Munkidori lives, because they move it back onto the deck's Pokémon. In the Live loss, 90 of the dog's 260 came back that way.
  • Munkidori is weak to Darkness. Boss's Orders plus any real attack kills it, so answering it doesn't need a Gengar in play.
  • Gengar ex gets the Candy, not the Mega. Concealment does nothing against moved counters.
  • Risky Ruins replaces Spikemuth Gym and puts 20 on every Munkidori they bench.

Versus Dhelmise

Their number
The answer
Poltchageist 30, Sinistcha 60, Banette 80, all with Hide 'n' Sneak
Chaotic Pain can't touch them, and attack damage can
Vengeful Anchor: 30, plus 140 with four Hide 'n' Sneak Pokémon in their discard
170 from a 140 HP Basic; Gengar ex survives one
Matcha Spin (six in the discard) puts 4 counters on each of the deck's Pokémon; Spiritual End (thirteen) quadruples the counters on two of them
keep counters off the board
Eevee into Espeon, whose Miraculous Shine devolves every evolved Pokémon the deck has in play
kill the Eevee first
  • Everything they attack with is single-Prize, so no Mega. The Live loss handed them its last 3 Prizes on a dragged-up Mega.
  • Chaotic Pain targets are Dhelmise (140, after a Ruins chip), Spiritomb (60), and Eevee or Espeon. Read the Ability first; that loss also spent its first Pain on a Poltchageist.
  • The dogs are the attackers. Dhelmise and Spiritomb are Psychic and weak to Darkness. Chain-Crazed hit for 520 and took three Knock Outs.
  • Surge only what attacks this turn. Spiritual End turned the Surge counters on the Mega into 18.
  • Fainting Spell still works. It took a Dhelmise.

Versus Crustle

Their number
The answer
Mysterious Rock Inn: Crustle takes no damage from the deck's Pokémon ex
counters aren't damage, and the non-ex Pokémon still hit it
Crustle 150, or 170 with Growing Grass Energy; Dwebble 70
a Pain plus Haunter's Spooky Shot (40) kills either
Mist Energy: no effects of attacks on the Pokémon holding it
Chaotic Pain can't touch it; Toxtricity's Gentle Slap (100) still can
Mega Kangaskhan ex, a 300 HP Basic: Rapid-Fire Combo is 200, plus 50 per heads
a dog plus Gentle Slap or Void Gale
Superb Scissors: 120
Gengar ex survives two

Crustle is one of the most common decks at CardCrate. Online, nearly every list pairs three Crustle with four Mega Kangaskhan ex. The rest is Mist Energy, Spiky Energy, Jumbo Ice Cream to heal, and Eri and Xerosic's Machinations to pick apart the hand.

  • Shoot Crustle before the Mist lands. Superb Scissors costs GrassColorlessColorless, so an attacking Crustle usually holds a Mist Energy, and then Chaotic Pain can't touch it. Dwebble and a Crustle still waiting on Energy are the targets. Read the Energy before picking.
  • The non-ex Pokémon are the attackers. Rock Inn only stops Pokémon ex. Gentle Slap does 100, Haunter's Spooky Shot does 40 for one Energy, and Toxel's Playful Kick adds 20.
  • Spiky Energy hits back. Damage their Active while it holds one and the attacker takes 2 counters. One Slap leaves Toxtricity at exactly 120, which Superb Scissors kills.
  • Fainting Spell works on Crustle. It is an Ability, so neither Rock Inn nor Mist stops the coin.
  • No Mega until Kangaskhan is attacking. Crustle is single-Prize, so Concealment pays only when Kangaskhan takes the Knock Out.
  • Finish a Crustle in one turn. Jumbo Ice Cream heals 80 from an Active holding three Energy, so the chip comes back off.
  • Festival Grounds stops Poison, and Chain-Crazed drops to 130. Replace it with Risky Ruins.

Versus Beedrill ex

Their number
The answer
Rumbling Bees: 110 for each Beedrill in play, for one Grass Energy
330 at three and 440 at four; the Mega survives three
Forest of Vitality: Weedle to Beedrill ex on the turn it is played
no cradle ever sits on their Bench for a Pain
Beedrill ex 310, Weedle 50, Kakuna 80
a Pain plus a dog swing or Void Gale for each Beedrill
Dunsparce into Dudunsparce, drawing three a turn
Dunsparce has to sit a turn, and Forest doesn't help it
  • Shoot the draw, not the bees. Every dead Dunsparce is three cards they don't draw next turn.
  • Stranded Weedle and Kakuna are free. When they bench a Weedle without the evolutions in hand, it sits a turn. Kakuna's Exoskeleton only reduces attack damage, so counters go straight through.
  • Every Beedrill Knocked Out takes 110 off their attack.
  • Risky Ruins is a tax, not a lock. They run four Forests, and Celebi searches for more.
  • The dogs are weak to Fighting, not Grass, so two bees (220) don't kill one.

Versus Mega Starmie ex

Their number
The answer
Mega Starmie ex: a Stage 1 from Staryu (70), 330 HP, online on their second turn
going second, the deck can't reach the Staryu in time
Jetting Blow: 120, plus 50 to one Benched Pokémon, for one Energy
two hits kill a Gastly or Toxel
Nebula Beam: 210, ignoring every effect
Okidogi at 250 and Gengar ex at 280 both survive it
  • Race it with the dog. Musculature on turn 1 and Chain-Crazed for 260 on turn 2 leave Starmie at 70, and one Chaotic Pain takes their Mega for 3 Prizes.
  • Don't Surge a Gastly in this room. Jetting Blow's 50 plus Surge's 20 is exactly 70.
  • Mega first, since they attack with a Pokémon ex.

Versus Mega Floette ex

Their number
The answer
Mega Floette ex: a 250 HP Basic, 400 with Ange Floette in play
Risky Ruins replaces Ange Floette, and it drops back to 250
Eternity Bloom: 200, plus four Energy onto their Bench
Gengar ex survives one hit
Weakness is Metal, not Darkness
nothing doubles
  • At 400, only two things kill it in one go. Fainting Spell did it on Live. The other is replacing Ange Floette and then swinging Chain-Crazed for 260.
  • Latias ex gives their Basics free retreat, and Munkidori shows up here too. Munkidori stays priority one.
  • Mega first, since their attacker is a Pokémon ex.

Versus Toxtricity Box

Their number
The answer
Crushing Hammer, four copies
take both from Musculature, and keep a Recycler
Fezandipiti ex: Cruel Arrow does 100 to any one of the deck's Pokémon
the Bench isn't safe, so a doomed dog swings first
Mew ex (30th Celebration 152): a 160 HP Basic ex that uses its Bench's attacks
it is weak to Darkness, and Chain-Crazed hit it for 520
Munkidori, Unfair Stamp, Special Red Card
Chaotic Pain the Munkidori; bench Pokémon as they're drawn
  • Retreat was the leak in the Live win. Seven Energy went to Retreat Costs, and a turn-6 dog retreat skipped a free 260 into a 120 HP Scrafty.
  • Use their Team Rocket's Factory. Petrel is a Team Rocket's Supporter, so their Stadium draws two for this deck too.
  • Mew ex needs damage, not counters. Chaotic Pain's 130 falls short of 160; a dog or Void Gale one-shots it.

Versus Mega Sharpedo ex

Their number
The answer
Hungry Jaws: 120 for two Energy, 270 once Sharpedo has any damage counters
Gengar ex at 280 and the Mega at 350 survive it
Binding Mochi: +40 while Sharpedo is Poisoned, and Pecharunt ex's Subjugating Chains Poisons it on purpose
310, which kills a Gengar ex without the Cape
Mega Sharpedo ex: 330 HP, Retreat 0, Stage 1 from Carvanha (70)
a dog plus a Pain, and every counter they put on it counts toward the deck's
Their own Toxtricity, and Munkidori moving 3 counters a turn onto the deck's Pokémon
Chaotic Pain the Munkidori, then their Toxel

Steve played this at CardCrate last week. He usually plays Dragapult, and he plays fast. Online it is called Sharpedo Toxtricity, and 26 of 28 online lists aim Toxel and Toxtricity's Sinister Surge at their own Sharpedo, because Hungry Jaws needs just one damage counter to jump from 120 to 270. Steve's support line was a different Darkness evolution line, from an older set, and it is still unidentified. Whatever it is, the job is the same: put counters or Energy on the Sharpedo. Lists also run Judge and Unfair Stamp, so Pokémon go to the Bench as they're drawn.

  • Kill order: Munkidori, then their Toxel. Moved counters skip Concealment and Fainting Spell, and 3 a turn put the Mega in range of 310. Once their Toxel evolves, Toxtricity (140) takes a dog.
  • Gengar ex first, per the Munkidori rule. Then the Mega, since Sharpedo and Pecharunt ex are both Pokémon ex.
  • The Cape goes on Gengar ex. At 380 it clears the Poisoned 310; the Mega at 350 already does.
  • Their counters are the deck's damage. Surge's 20, Carvanha's recoil, and Poison all stay on the Sharpedo. One carrying 70 dies to a single dog swing.
  • Boss's Orders never strands anything here. Sharpedo retreats for free and Pecharunt swaps it out. Boss only for a Knock Out: Munkidori, Pecharunt ex (190, one dog swing), or a damaged Sharpedo.
  • Going second, the Carvanha is out of reach, the same as Starmie. Race with the dog.
  • Risky Ruins barely matters. Everything but Munkidori, Tatsugiri, and Fezandipiti ex is Darkness.

Versus Cinccino ex

Their number
The answer
Energized Slap: 40 for every Energy on Cinccino, for one Energy
7 Energy kills a Gengar ex, 9 the Mega, 10 a Cape'd Gengar ex
Smooth Coat: a coin on every attack's damage, and heads prevents it
counters aren't damage, so Chaotic Pain never flips
Cinccino ex 240, Minccino 70
two Pains, or one on the Minccino
Online lists load it with Metang's Metal Maker
Chaotic Pain the Metang, the same as against Excadrill

This one shows up at CardCrate. Last week a Cinccino ex won a game at the shop with 15 Energy on it and no other Pokémon in play, which is 600 damage. Online lists feed it with the same Metang engine Matt's Excadrill uses, plus Genesect ex and Metagross.

  • Chaotic Pain is the attack. Every dog swing is a coin flip against Smooth Coat, and two Pains kill Cinccino ex with no flip at all.
  • Kill it early. Its damage grows every turn it lives, and its 240 HP doesn't. Two Pains kill it at two Energy or at fifteen.
  • If it is their only Pokémon, a Knock Out wins the game. A player with nothing left in play loses on the spot, whatever the Prizes say.
  • Mega first. Cinccino ex is a Pokémon ex, so Concealment works, and Fainting Spell is an Ability that Smooth Coat can't flip away.
  • Metang before Cinccino when both are up. Every Metang is roughly one more Energy a turn.

Versus Charizard and Battle Cage

Their number
The answer
Battle Cage: no counters on their Benched Pokémon
Risky Ruins replaces it, and Petrel finds the Ruins
Charmander 80
Chaotic Pain, once the Cage is gone
Mega Charizard X ex and Mega Charizard Y ex, both Pokémon ex
Mega first; the tax and Fainting Spell both work
  • They replay the Cage. In the Live win, Petrel for Ruins removed it, and the second Ruins removed it again.
  • Close with Void Gale. Boss's Orders on a benched Pokémon ex, Switch in the Mega, attach, and swing.

Versus Igglybuff Baby Box

Their number
The answer
Bouncy Circle: free, 30 for each Benched Pokémon with 30 max HP, so 150 off a full Bench
one hit kills Gastly, Toxel, Haunter, or Toxtricity; every ex here takes two
Brave Bangle (+30) and Black Belt's Training (+40), against an Active Pokémon ex only
two Bangle hits are 360, which a Cape'd Gengar ex (380) survives and a bare one (280) doesn't
Igglybuff: 30 HP, Retreat 0, and their only attacker
one Chaotic Pain, or Haunter's Spooky Shot for 40
Poltchageist, Misty's Magikarp on the Bench, Battle Cage, Mist Energy
Chaotic Pain can't touch them, and it doesn't need to

Every Pokémon in it has 30 HP and gives up one Prize. Plenty of players run it online as a troll deck, and the Live ladder has sent two, both wins. One matched AzulGG's list from September 26: 4 Igglybuff, 4 Poltchageist, 2 Misty's Magikarp, Tyrogue, Budew, 4 Brave Bangle, 4 Boss's Orders, 4 Night Stretcher, 4 Battle Cage, 3 Mist Energy, and a Legacy Energy. The other ran Teal Mask Ogerpon ex and Area Zero Underdepths.

  • Go second when you win the flip. The player going first can't attack, and Bouncy Circle costs nothing, so their turn 1 is the one to take away.
  • Pain the Active Igglybuff every turn. It's their only attacker, and Battle Cage guards only their Bench. They run four Igglybuffs and four Night Stretchers, so this is a race, not a lockout. After the fifth Knock Out in the Live win, they had no Igglybuff in play and conceded.
  • Legacy Energy and Mist Energy pick the attack. Legacy takes a Prize off a Knock Out by damage, and counters aren't damage, so Pain that one. Mist stops Pain, so hit that one with damage: Spooky Shot or a dog.
  • Make their attacks miss. Every body here gives up about one Prize per Bouncy Circle, so the race turns on the attacks that take nothing. AZ's a Gengar ex after its first hit, per the pull table, and a Haunter swings in its place. The Live win let one stand at 170, and it gave them 2 Prizes and put them one from winning.
  • The Cape goes on Gengar ex. At 380 it survives any two hits short of Black Belt's.
  • No Mega. It's 3 Prizes, Concealment never applies, and two Bangle hits kill it. The Ogerpon build is the exception.
  • Bench small Basics only when they evolve next turn. They run four Boss's Orders, and a Gastly or Toxel is a Prize to a three-baby Bench. Morty's Conviction also draws them a card for every Pokémon on the deck's Bench.
  • Keep Surge counters off the next Gengar ex. At 280 it lives through 150 plus 120. The Live win's carried a Surge and died at 290. Surge the dog or a Haunter.
  • Budew's Itchy Pollen turns off Switch and Rare Candy for a turn, and AZ's still moves. Special Red Card lands when the deck reaches 3 Prizes left, so spend the hand before then.
  • The Ogerpon build adds Teal Mask Ogerpon ex and Area Zero Underdepths, which opens their Bench to 8 and Bouncy Circle to 210. Risky Ruins bumps Area Zero, and knocking out their only Tera does the same job: their Bench drops back to 5. Void Gale's 230 one-shots Ogerpon ex (210), and against that ex attacker Concealment works. In the Live win the Mega took two.

The rest of the room

DeckThe problemThe answer
Slowking, 6%Seek Inspiration copies a non-Rule-Box attack off the top of their deck; single-Prize120 HP, so one Chaotic Pain; no Mega
Basic Box, 5%Benches full of Pokémon ex under Area Zero, and no cradles to shootthe tax room. Mega first, and Ruins taxes every Basic.
Jellicent exOceanic Curse locks the deck's Items and Tools while it is ActiveGrimsley's, Janine's, AZ's, Boss's Orders, and Surge all still work; it is Psychic and weak to Darkness, so a dog one-shots it
Festival GroundsPokémon with Energy can't be Poisoned, so Chain-Crazed stays at 130Risky Ruins; neither Gengar attack needs Poison

Test and Tune

The list is a hypothesis, and games are the data.

Symptom
Fix
The first attack keeps arriving late
2nd Janine's Secret Art over the 2nd Boss's Orders. In the simulator it was worth about a point of first-attack speed and two points of Gengar speed by turn 5.
Alakazam keeps winning
Unfair Stamp over Hero's Cape. Their damage is their hand.
Hands dry up mid-game
4th Lillie's Determination over the 2nd Boss's Orders
Lone-Basic openings still cost games
3rd Poke Pad over a Dawn
Mulligans still hurt
4th Okidogi ex over the 2nd Hilda: 12 Basics and a 19% mulligan
Stage 2s never arrive
3rd Haunter over a Grimsley's Move
Grimsley's keeps missing
Count the targets first (odds). If it still misses, 3rd Dawn over a Grimsley's.
Crushing Hammer rooms drain the deck
11th Basic Darkness Energy over a Risky Ruins
Energy runs out late anyway
Energy Retrieval over a Switch
Jamming Tower keeps turning the Cape off
3rd Risky Ruins over a Switch
Single-Prize decks keep winning the race
the Perfect Order Gengar over a Toxel; see Alternatives
The Mega keeps getting dragged up in single-Prize rooms
not a card problem; leave it in the deck, per the rule

Alternatives

Two days of Live testing produced more good cards than seats, and a few the games rejected.

CardSwaps forPlay it when
Janine's Secret Art, the 2ndthe 2nd Boss's Ordersthe first attack keeps arriving late; see Test and Tune
Night Stretchera Poke Padthe deck needs a Pokémon back more than a turn-1 Basic. Swapped out on September 24, and it may still get a reprint before April.
Energy Switcha SwitchSurge Energy keeps getting stranded on the Bench. It left when Janine's took over topping up the Active.
Unfair StampHero's CapeAlakazam is the room. Every ACE SPEC rotates in April anyway.
Gengar ex (Temporal Forces 104)a Dawnthe list wants a 4th Gengar ex in paper. Gnawing Curse puts 2 counters on anything they attach to from hand, and it shares the four-copy cap.
Gengar (Perfect Order 050)a Toxelthe ladder turns single-Prize. Mind Jack is 10, plus 30 for each of their Benched Pokémon, for one Energy, from a body that returns to the hand when it dies.
Purrloin (White Flare 055)a Toxelnever again. Invite Evil searches three Darkness Pokémon for one Energy, but it has to be Active to attack, and on Live two uses cost two attachments and a switch.
N's Plannever heretested in the zero-Haunter build. It moves two Energy from the Bench to the Active, and this list rarely has spare Energy on the Bench.
Mega Darkrai exnevertested and rejected. A Basic Mega with Dusk Raid at 220, but its Grass Weakness made it a one-hit, 3-Prize gift to Beedrill, and it only carried against Fighting.
Dark Bellnevertested for Mega Darkrai's Abyss Eye. It went unplayed for seven games and is blank against Darkness Actives.
Crobat (Shrouded Fable 029) and ZubatneverJanine's with Crobat in play draws to eight, but the simulator had that firing by turn 5 in only 12% of games.
Dudunsparce and Dunsparceneverthe field's favorite draw engine. In this list the simulator found no gain for four slots.
Budewnevera free turn-1 Item lock, but the deck's own Ruins hits it, and it competes with Musculature and Call for Family for the turn-1 attack
Grand Treenevera free evolution every turn for both players, which Dragapult and Alakazam want more than this deck does; it also fights the Ruins and costs the Cape
Academy at Nightneverit guarantees Grimsley's by putting a card from the hand on top of the deck, but the opponent gets it too, and it takes the Stadium slot
Pokégear 3.0a Dawnthe deck wants Grimsley's more often. A Supporter is in the top seven more than 90% of the time, but a specific two-of only 29%.
Buddy-Buddy Poffin, the 3rda Hildalone-Basic openings go on costing games
Secret BoxHero's Capenever. Discarding three fights a deck that plans turns ahead.
Shadowy Darkness Energyneverit protects a Benched Darkness Pokémon from attack damage, but it is Special Energy, and nothing in this deck finds or recovers it
WaitressJanine'snever. It looks at six cards for one Energy and can miss.
Punk Helmetnever heretested in the zero-Haunter build and never mattered
Sacred Ashan Energy Recyclerthe Pokémon side of the discard runs dry. It never has.
Prime CatcherHero's Capea third gust matters more than a bigger Gengar
Cyranoa Hildathe deck wants three Pokémon ex from one card; mark H
Energy Retrievala Switchthe Recyclers stop keeping up
Energy Searchneveran 11th Energy that no engine can see
Ultra Balla Dawnmost lists run it. This one doesn't, because the discard cost fights a hand planned two turns ahead.
Scramble SwitchHero's Capetried and cut; losing the gust slot cost a game
Jamming Towera Risky RuinsAir Balloon keeps resetting Mega Brave. It turns the Cape off too.
Binding MochiHero's Capethe dogs become the main attackers. +40 on a Poisoned dog is 300.
Air Balloonnevertried and cut; it died on the Gastly wearing it
Battle Cagea Risky RuinsDragapult's counters are killing the Bench. It turns off the deck's own snipe too.
Eternatus (Phantasmal Flames 069)a ToxelStadium wars keep losing games; Shatter discards a Stadium
Tremendous BombHero's Capethe room is all Mega ex. It puts 12 counters on any Mega that hits the wearer for 240 or more.
Gwynnnevertried and cut. It discards Pokémon without a Rule Box, which are the ones the deck benches on sight.
Kofua Poffindraw has to be always live
Fezandipiti ex, Pecharunt ex, Munkidori, Chi-Yunevertried or rejected in earlier passes; they broke the rhythm
Marnie's Grimmsnarl exneverPunk Up feeds only Marnie's Pokémon