Psychic Storm

Deck List

Pokémon (17)

Qty	Card	Set	Number	Reg
3	Mewtwo ex	30th Celebration	064	J
4	Xerneas	Chaos Rising	042	J
3	Deoxys	Chaos Rising	031	J
1	Deoxys	Chaos Rising	032	J
3	Eevee	Prismatic Evolutions	074	H
2	Espeon	30th Celebration	069	J
1	Latias ex	Surging Sparks	076	H

Trainers (29)

Qty	Card	Type	Set	Number	Reg
4	Lillie's Determination	Supporter	Mega Evolution	119	I
3	Boss's Orders	Supporter	Mega Evolution	114	I
1	Hilda	Supporter	White Flare	084	I
4	Ultra Ball	Item	Mega Evolution	131	I
4	Energy Switch	Item	Mega Evolution	115	I
3	Poke Pad	Item	Perfect Order	081	J
3	Wondrous Patch	Item	Phantasmal Flames	094	I
2	Night Stretcher	Item	Shrouded Fable	061	H
1	Switch	Item	Mega Evolution	130	I
1	Hero's Cape	Tool, ACE SPEC	Temporal Forces	152	H
3	Mystery Garden	Stadium	Mega Evolution	122	I

Energy (14)

Qty	Card	Set	Number	Reg
10	Basic Psychic Energy	Mega Evolution Energies	005	-
4	Telepathic Psychic Energy	Perfect Order	088	J

17 + 29 + 14 = 60. ✓ Fifteen Basics, eight Supporters, and one ACE SPEC. Xerneas and Deoxys each sit at four, which is the limit for the name across every print.

Fifteen Basics is a 12% mulligan. A Genome Charge Deoxys opens 36% of kept hands. Telepathic Psychic Energy is in 39% of them, and 45% counting the first draw going second; it benches two Basics whatever leads. Only 14% of opening hands hold no Energy.

Eevee, Latias ex, Night Stretcher, and Hero's Cape carry mark H and rotate around April 2027. Everything else is I or J.

Pokémon

Mewtwo exx3

Set: ME: 30th Celebration 064/128
Rarity: Double Rare
Type: Psychic
HP: 230
Stage: Basic
Weakness: Darkness ×2
Resistance: Fighting -30
Retreat: 2
Tournament: legal (Reg J)
Attack: Photon Bullets - This attack does 50 damage to each of your opponent's Pokémon ex. (Don't apply Weakness and Resistance for Benched Pokémon.)
Attack: Psychic Powers (230) - During your next turn, this Pokémon can't use attacks.

Basic, 230 HP, 2 Prizes, Darkness Weakness, Fighting Resistance, Retreat 2. The main attacker.

Psychic Powers does 230 for , and this Mewtwo can't attack during your next turn. The lock ends the moment it moves to the Bench. Retreat it for free with Latias ex out, swing with Xerneas, and the turn after that the same Mewtwo is ready again.

Photon Bullets is for 50 to each of the opponent's Pokémon ex, Bench included, with no Weakness or Resistance on the Bench. It is the setup turn against a board full of ex. A Benched Tera Pokémon, like Dragapult ex, takes none of it.

Three copies. Ultra Ball and Telepathic Psychic Energy find it. Poke Pad can't, since it has a Rule Box.

Xerneasx4

Set: ME04: Chaos Rising 042/086
Rarity: Rare
Type: Psychic
HP: 130
Stage: Basic
Weakness: Metal ×2
Retreat: 2
Tournament: legal (Reg J)
Attack: Geo Storm (30x) - This attack does 30 damage for each Psychic Energy attached to all of your Pokémon.

Basic, 130 HP, Metal Weakness, Retreat 2. The finisher.

Geo Storm costs and does 30 for each Psychic Energy attached to all of your Pokémon. The Energy can sit anywhere: on the Active, on a Benched Deoxys, on the Mewtwo waiting its turn. Telepathic Psychic Energy counts, because it provides Psychic . Its own three make 90, and eight in play make 240 from a Pokémon worth 1 Prize.

It is the only Pokémon here that isn't weak to Darkness, which makes it the attacker against Dad's decks. Metal is its problem, and Matt's Excadrill doubles into it.

Four copies, the most the name allows; every Xerneas print shares the four. Poke Pad, Ultra Ball, and Telepathic Psychic Energy find it.

Deoxys (Chaos Rising 031)x3

Set: ME04: Chaos Rising 031/086
Rarity: Uncommon
Type: Psychic
HP: 110
Stage: Basic
Weakness: Darkness ×2
Resistance: Fighting -30
Retreat: 1
Tournament: legal (Reg J)
Attack: Genome Charge - Search your deck for up to 2 Basic Psychic Energy cards and attach them to this Pokémon. Then, shuffle your deck.
Attack: Psychic (80+) - This attack does 20 more damage for each Energy attached to your opponent's Active Pokémon.

Basic, 110 HP, Darkness Weakness, Fighting Resistance, Retreat 1. The engine.

Genome Charge costs : search your deck for up to 2 Basic Psychic Energy and attach them to this Deoxys. Going second, it is a turn-one attack. Lead with it, attach, and it ends the turn holding three Energy, which is 90 more on the next Geo Storm. Energy Switch then moves the two Basic Energy to whoever attacks.

Psychic is Psychic Psychic Colorless for 80, plus 20 for each Energy on the opponent's Active Pokémon.

Three copies. Every Deoxys shares one four-copy limit, so three of this one leave a slot for Fox's Psyspear. Poke Pad, Ultra Ball, and Telepathic Psychic Energy find it.

Deoxys (Chaos Rising 032)x1

Set: ME04: Chaos Rising 032/086
Rarity: Uncommon
Type: Psychic
HP: 120
Stage: Basic
Weakness: Darkness ×2
Resistance: Fighting -30
Retreat: 2
Tournament: legal (Reg J)
Attack: Psyspear (120) - If this Pokémon has at least 2 extra Energy attached (in addition to this attack's cost), this attack also does 120 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Basic, 120 HP, Darkness Weakness, Fighting Resistance, Retreat 2. Fox's pick, and the second finisher.

Psyspear is for 120. With at least 2 extra Energy on this Deoxys, it also does 120 to one of the opponent's Benched Pokémon, with no Weakness or Resistance on the Bench.

Five Energy is a lot to park on 120 HP, so build it late with Energy Switch, on the turn the Bench hit takes a Prize. Those five count toward Geo Storm the whole time they sit there. One copy.

Eeveex3

Set: SV: Prismatic Evolutions 074/131
Rarity: Common
Type: Colorless
HP: 50
Stage: Basic
Ability: Boosted Evolution - As long as this Pokémon is in the Active Spot, it can evolve during your first turn or the turn you play it.
Weakness: Fighting ×2
Retreat: 1
Tournament: legal (Reg H)
Attack: Reckless Charge (30) - This Pokémon also does 10 damage to itself.

Basic Colorless, 50 HP, Fighting Weakness, Retreat 1. Espeon's Basic, the same print Fox's Rainbow DNA runs.

Boosted Evolution: while this Eevee is in the Active Spot, it can evolve during your first turn or the turn you play it. Bench Eevee only when Espeon is close, because a 50 HP Basic is a free Prize.

It is Colorless, so Telepathic Psychic Energy can't bench it and Mystery Garden doesn't count it. Three copies. Poke Pad and Ultra Ball find it.

Espeonx2

Set: ME: 30th Celebration 069/128
Rarity: Common
Type: Psychic
HP: 110
Stage: Stage 1
Weakness: Darkness ×2
Resistance: Fighting -30
Retreat: 1
Tournament: legal (Reg J)
Attack: Miraculous Shine - Devolve each of your opponent's evolved Pokémon by putting the highest Stage Evolution card on it into your opponent's hand.
Attack: Super Psy Bolt (90)

Stage 1, 110 HP, Darkness Weakness, Fighting Resistance, Retreat 1. The answer to evolution decks.

Miraculous Shine is : devolve each of the opponent's evolved Pokémon by putting the highest Stage Evolution card on it into their hand. Every one, Active and Bench. Energy, Tools, and damage stay where they are. A Stage 2 that Rare Candy put down drops all the way to its Basic.

Damage stays, so a Pokémon that drops below its damage is Knocked Out. A Garchomp ex carrying 230 from Psychic Powers becomes a Gabite with 170 HP under Power Weight, and dies. It pays as what it is now, so that Gabite is 1 Prize, not 2. Bulbapedia's devolution page states the knockout rule. Check it with the league judge before it decides a game.

A Pokémon that Grimsley's Move benched never evolved and has nothing under it, so it stays. Super Psy Bolt is Psychic Colorless for 90. Two copies. Hilda and Poke Pad find it.

Latias exx1

Set: SV08: Surging Sparks 076/191
Rarity: Double Rare
Type: Psychic
HP: 210
Stage: Basic
Ability: Skyliner - Your Basic Pokémon in play have no Retreat Cost.
Weakness: Darkness ×2
Resistance: Fighting -30
Retreat: 2
Tournament: legal (Reg H)
Attack: Eon Blade (200) - During your next turn, this Pokémon can't attack.

Basic, 210 HP, 2 Prizes, Darkness Weakness, Fighting Resistance, Retreat 2. The pivot.

Skyliner: your Basic Pokémon in play have no Retreat Cost. Every Pokémon here but Espeon is a Basic, so every retreat is free. That is what lets Mewtwo ex swing every other turn with Xerneas in between, and what lets a loaded Deoxys leave the Active Spot without paying Energy.

Eon Blade is Psychic Psychic Colorless for 200, and Latias can't attack next turn. It is 2 Prizes on the Bench, and Boss's Orders will find it. One copy, and the house already owns it.

Trainers — Supporters

Lillie's Determinationx4

Set: ME01: Mega Evolution 119/132
Rarity: Uncommon
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: legal (Reg I)

Shuffle your hand into your deck and draw six, or eight while you still have all six Prizes. Four copies. Going second, the turn-one Lillie's for eight is legal and good. Look first; a hand that already holds a Deoxys, Telepathic, and an Energy Switch doesn't want shuffling.

Boss's Ordersx3

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

Switch one of the opponent's Benched Pokémon into the Active Spot. Three copies. A 230 is worth what it lands on. Drag up the damaged ex that Geo Storm finishes, the Meowth ex worth 2 Prizes for one Psychic Powers, or the Energy engine their attacker runs on.

Hildax1

Set: SV: White Flare 084/086
Rarity: Uncommon
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: legal (Reg I)

Search your deck for an Evolution Pokémon and an Energy card. One copy. Espeon is the only Evolution Pokémon here, so Hilda is an Espeon and a Telepathic Psychic Energy in one card.

Trainers — Items

Ultra Ballx4

Set: ME01: Mega Evolution 131/132
Rarity: Common
Type: Trainer - Item
Ability: You can use this card only if you discard 2 other cards from your hand. Search your deck for a Pokémon, reveal it, and put it into your hand. Then, shuffle your deck.
Tournament: legal (Reg I)

Discard 2 other cards from your hand, then search your deck for any Pokémon. Four copies. It is the only search that finds Mewtwo ex and Latias ex. Discard Basic Psychic Energy when you can; Wondrous Patch puts it back on the board.

Energy Switchx4

Set: ME01: Mega Evolution 115/132
Rarity: Common
Type: Trainer - Item
Ability: Move a Basic Energy from 1 of your Pokémon to another of your Pokémon.
Tournament: legal (Reg I)

Move a Basic Energy from one of your Pokémon to another. Four copies, Mega Evolution 115, mark I. The older Scarlet and Violet print rotated.

This is how Genome Charge feeds the attacker. Two Switches move both Genome Energy from Deoxys onto a Benched Mewtwo ex, and the attachment makes three. It can't move Telepathic Psychic Energy, which is Special.

Poke Padx3

Set: ME03: Perfect Order 081/088
Rarity: Uncommon
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: legal (Reg J)

Search your deck for a Pokémon without a Rule Box. Three copies, printed Poké Pad, Perfect Order 081, mark J. It finds Xerneas, both Deoxys, Eevee, and Espeon, and never Mewtwo ex or Latias ex.

Wondrous Patchx3

Set: ME02: Phantasmal Flames 094/094
Rarity: Uncommon
Type: Trainer - Item
Ability: Attach a Basic Psychic Energy card from your discard pile to 1 of your Benched Psychic Pokémon.
Tournament: legal (Reg I)

Attach a Basic Psychic Energy card from your discard pile to one of your Benched Psychic Pokémon. Three copies, Phantasmal Flames 094, mark I. It is an extra attachment for each copy, aimed at the Bench, never the Active or an Eevee. Mystery Garden, Ultra Ball, and every Knocked Out battery stock the discard pile it draws from.

Night Stretcherx2

Set: SV: Shrouded Fable 061/064
Rarity: Uncommon
Type: Trainer - Item
Ability: Put a Pokémon or a Basic Energy card from your discard pile into your hand.
Tournament: legal (Reg H)

Put a Pokémon or a Basic Energy card from your discard pile into your hand. Two copies. Late in the game it is the Xerneas or Mewtwo ex that went down, back for the finish.

Switchx1

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

Switch your Active Pokémon with one of your Benched Pokémon. One copy. It covers the games where Latias ex is prized or Knocked Out, and Mewtwo ex and Xerneas are back to Retreat 2.

Trainers — Tool & Stadium

Hero's Capex1

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

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

It goes on Mewtwo ex against Fighting, and on Xerneas against Dad. A Cape'd Mewtwo ex has 330 HP behind Fighting Resistance, and Elliott needs a Draconic Buster with four boosts to kill it. A Cape'd Xerneas has 230, and lives through Chaotic Pain. If the Pokémon wearing it is Knocked Out, the Cape goes with it; Night Stretcher can't return a Tool.

Mystery Gardenx3

Set: ME01: Mega Evolution 122/132
Rarity: Uncommon
Type: Trainer - Stadium
Ability: Once during each player's turn, that player may discard an Energy card from their hand in order to draw cards until they have as many cards in their hand as they have Psychic Pokémon in play.
Tournament: legal (Reg I)

Once during each player's turn, that player may discard an Energy card from their hand to draw until they hold as many cards as they have Psychic Pokémon in play. Three copies, Mega Evolution 122, mark I.

With five Psychic Pokémon down, it refills a hand to five for one Energy, and that Energy is Wondrous Patch's next attachment. It does little before the Bench fills. Both players can use it, so against another Psychic deck it draws for them too. It also knocks Risky Ruins and Battle Cage off the table.

Energy

Basic Psychic Energyx10

Set: MEE: Mega Evolution Energies 5
Rarity: Common
Type: Energy - Basic
Tournament: legal

Ten. Genome Charge, Energy Switch, Wondrous Patch, and Night Stretcher only touch Basic Energy, so these are the ones that move. Any Basic Psychic print works.

Telepathic Psychic Energyx4

Set: ME03: Perfect Order 088/088
Rarity: Rare
Type: Energy - Special Psychic
Ability: As long as this card is attached to a Pokémon, it provides Energy. When you attach this card from your hand to a Pokémon, search your deck for up to 2 Basic Pokémon and put them onto your Bench. Then, shuffle your deck.
Tournament: legal (Reg J)

It provides . When you attach it from your hand to a Psychic Pokémon, search your deck for up to 2 Basic Psychic Pokémon and put them onto your Bench. Four copies, Perfect Order 088, mark J.

It is the turn-one card. It counts for Geo Storm like any other Psychic Energy, and the two it benches are usually Latias ex and the next attacker. It is a one-way trip. It is Special Energy, so Energy Switch can't move it and Night Stretcher and Wondrous Patch can't bring it back.

The Thesis

Geo Storm counts every Psychic Energy Fox has in play, wherever it sits. So nothing he attaches is wasted. A Deoxys holding three is 90 more damage on Xerneas, and so is the Mewtwo ex waiting out its lock.

Mewtwo ex hits first, and Xerneas finishes. Psychic Powers lands 230 on anything. The next turn, Mewtwo retreats for free and Xerneas swings for whatever is left. Mewtwo keeps its three Energy on the Bench, so that Geo Storm counts at least six: Mewtwo's three and Xerneas's own. The pair does 410 in two attacks, and every row below dies to it.

Their Pokémon	HP	Left after 230	Geo Storm needs
Blissey ex	300	70	3 Energy in play, 90
Dragapult ex	320	90	3 Energy in play, 90
Mega Excadrill ex	340	110	4 Energy in play, 120
Mega Gengar ex	350	120	4 Energy in play, 120
Cynthia's Garchomp ex, Power Weight	400	170	6 Energy in play, 180

Attack	Cost	Damage
Psychic Powers, Mewtwo ex		230, then it can't attack next turn
Geo Storm, Xerneas		30 per Psychic Energy in play: 180 at six, 240 at eight, 300 at ten
Psyspear, Deoxys 032		120, plus 120 to the Bench with five Energy on it
Photon Bullets, Mewtwo ex		50 to every Pokémon ex they have
Miraculous Shine, Espeon		no damage; every evolved Pokémon they have goes back a stage
Genome Charge, Deoxys 031		no damage; two Energy from the deck onto itself

Most of the deck gives up 1 Prize. Xerneas, both Deoxys, and Espeon are the bodies that take the late hits, and Mewtwo ex is the only attacker worth two. The Prize Tax covers the rest.

The Hard Rules

A few rules decide most games with this deck. The card sections explain the cards; this section explains the decisions.

Opening turns

When: Do this
Setup: Lead a Genome Charge Deoxys if you hold one. Otherwise lead Mewtwo ex, which survives longest. Lead Eevee only when it is your only Basic.
Your first turn: Telepathic Psychic Energy goes on the Active and benches two: Latias ex first, then Mewtwo ex or Xerneas.
First turn, going second: Genome Charge. Play Lillie's for eight unless the hand already holds next turn.
First turn, going first: No attack and no Supporter. Items, Mystery Garden, and Telepathic's two benches are all legal.
Second turn: Energy Switch the Genome Energy onto Mewtwo ex. Two Switches and the attachment make Psychic Powers; one makes Photon Bullets. With neither, Genome Charge again.

Where the Energy goes

Rule: Why
Spread it.: A Deoxys holding five is five Energy off the Geo Storm count the turn Boss's Orders finds it.
Telepathic only on a Psychic Pokémon.: Attached to Eevee, it benches nothing.
Basic Energy goes where it will move.: Energy Switch and Wondrous Patch only touch Basic Energy. Telepathic stays where it lands.
The attachment goes to the next attacker.: Genome Charge and Wondrous Patch fill the Bench. Only the attachment and Energy Switch reach the Active.
Mystery Garden only discards a spare.: The card it throws away is Wondrous Patch's next attachment, but only to the Bench.

Which attack

Their Active	Use	Why
230 HP or less	Psychic Powers	it kills, and Xerneas covers the locked turn
Already holding Mewtwo's 230	Geo Storm	the table in The Thesis says how much Energy it needs
A board of two or more ex	Photon Bullets	50 on each sets up two knockouts at once
Stage 2s, or evolved Pokémon carrying damage	Miraculous Shine	every one goes back a stage, and the damaged ones die
Crustle	Geo Storm or Psyspear	neither is an ex, so Mysterious Rock Inn can't stop them

Never leave Mewtwo ex Active on its locked turn. Retreat it for free and attack with someone else.

The Prize Tax

Pokémon: Prizes it gives up
Mewtwo ex, Latias ex: 2
Xerneas, Deoxys, Eevee, Espeon: 1

Six Prizes is three ex. The single-Prize bodies make the opponent take six knockouts, so give them those first.

One Mewtwo ex in play until the first is in trouble. A second one on the Bench is 2 Prizes for a Boss's Orders.
Latias ex comes down when free retreat matters this turn. Against Elliott it is the first thing his Boss's Orders looks for.
Late in the game, Xerneas takes the hits. It swings for the most and costs the least.

The Energy Engine

Source	From	To	Costs
Your attachment	hand	any of your Pokémon	once a turn
Telepathic Psychic Energy	hand	a Psychic Pokémon, and two Basic Psychic Pokémon from the deck to the Bench	your attachment
Genome Charge	deck, 2	the Deoxys that used it	its attack
Energy Switch	one of your Pokémon	another	an Item; Basic Energy only
Wondrous Patch	discard pile	a Benched Psychic Pokémon	an Item; Basic Psychic only
Night Stretcher	discard pile	hand	an Item; Basic Energy or a Pokémon
Hilda	deck	hand	your Supporter, with an Espeon
Mystery Garden	hand	discard pile	one Energy, for cards

Energy on the board is damage. Every one anywhere is 30 on the next Geo Storm. Energy in the discard pile is next turn's Wondrous Patch. Only Energy left in the deck does nothing, which is why Genome Charge pulls two at a time.

Game Plans

1. Turn one, going second

You can attack on your first turn going second, and the best attack is Genome Charge.

With Deoxys in front, attach to it, Telepathic if you have one, and Genome Charge. It ends the turn holding three Energy, and Telepathic has benched Latias ex and a Mewtwo ex.

Without a Deoxys, put Telepathic on the Active and bench Latias ex and a Deoxys. Play Lillie's while it still draws eight. With an Ultra Ball or Poke Pad spare, an Energy on the Benched Deoxys and a free retreat make the Genome Charge happen anyway.

2. Turn one, going first

You can't attack or play a Supporter, and every Item, Tool, and Stadium is still legal. Telepathic goes on the Active and benches two. Ultra Ball and Poke Pad fill the rest. Turn two is the same Genome Charge, or Photon Bullets from a Mewtwo ex holding two.

3. The rotation

Mewtwo ex and Xerneas trade the Active Spot every turn, and Latias ex makes each swap free.

Mewtwo ex: Psychic Powers for 230.
Xerneas: Mewtwo retreats for free, which ends its lock. Geo Storm finishes what Mewtwo hit.
Mewtwo ex again: Xerneas retreats for free, and Mewtwo swings at the next target.

Between attacks, Energy Switch and Wondrous Patch keep three on whichever of the two attacks next. A second Mewtwo ex does the same job without Latias, at the cost of 2 more Prizes on the Bench.

4. The Espeon turn

Miraculous Shine is the play when damage is already down and the board is evolved.

After Photon Bullets or Psychic Powers, every damaged Pokémon that drops below its damage dies at once.
Against Rare Candy decks, each Stage 2 falls back to its Basic, and they need another Candy to come back.
Against an Ability engine, devolving switches it off until they evolve again: Metang drops to Beldum, Toxtricity to Toxel, and Blissey ex to Chansey.

It does no damage, and the knockouts pay 1 Prize each. On a turn where Geo Storm can take 2 Prizes from the same Pokémon, Geo Storm is better.

5. Bench discipline

The Bench holds five. A working board is Latias ex, a Genome Charge Deoxys, a Xerneas, the next Mewtwo ex, and one spare.

Every Benched Pokémon should be holding Energy, or about to. A Bench seat that holds none adds nothing to Geo Storm.
The spare seat is an Eevee only when Espeon is in hand.
Against Phantom Dive and Chaotic Pain, a 50 HP Eevee or a 110 HP Deoxys on the Bench is a free Prize.

Versus the Kitchen Table

Xero's decks, from Fox's side of the table. His own page has the plan from the other chair.

Lucky Haunt, Xero's league deck. Xerneas carries this game. Every other Pokémon here is weak to Darkness, and every Darkness attacker in Lucky Haunt one-shots Mewtwo ex. Xerneas is weak to Metal, so nothing of his doubles into it.

Xero's hit	Into Mewtwo ex at 230	Into Xerneas at 130, or 230 Cape'd
Void Gale, Mega Gengar ex, 230	460, dies	dies, Cape or not
Chain-Crazed, Okidogi ex while Poisoned, 260	520, dies	dies
Return, Blissey ex, 180	lives on 50	dies; lives on 50 Cape'd
Gentle Slap, Toxtricity, 100	200, lives on 30	lives on 30
Chaotic Pain, Gengar ex, 13 counters	lives on 100	dies; lives on 100 Cape'd

The Cape goes on Xerneas. It turns Chaotic Pain and Return into hits it lives through.
Mystery Garden replaces Risky Ruins. Ruins puts 2 damage counters on every Basic non-Darkness Pokémon you bench during your turn, which is every Basic here. Bench what you can at setup, which isn't anyone's turn.
Espeon wrecks his board. Miraculous Shine sends every Gengar ex and Mega Gengar ex back to Haunter, or to Gastly when Rare Candy put it down. Blissey ex drops to Chansey and Toxtricity to Toxel. Neo Upper Energy on a devolved Gengar provides only , so it can't pay . Any Gengar that Grimsley's Move benched never evolved and stays.
Shadowy Concealment takes a Prize off every knockout Mewtwo ex scores on a Darkness Pokémon while a Mega Gengar is in play. Xerneas, Deoxys, and Espeon aren't ex, so they take the full count. Blissey ex and Chansey are Colorless, so Concealment never covers them.
Fainting Spell flips a coin at whatever knocks out a Gengar ex. Heads, the attacker dies too. Finish Gengar ex with Xerneas, and the bet is 1 Prize, not 2.
His page lists Eevee as a Chaotic Pain target. Bench it the turn before Espeon, never earlier.

Versus the Card Shop

The Wednesday league at CardCrate draws from this field. Each opponent page has the pilot's full plan.

Deck	The problem	The answer
Elliott's Cynthia's Garchomp ex	400 HP under Power Weight, and Draconic Buster is 260 plus 30 for each Roserade and Premium Power Pro	Its own section below
Matt's Mega Excadrill ex	Maximum Drilling is 330 with two extra Energy, which kills the Cape'd Mewtwo ex exactly. Xerneas is Metal-weak, so Undermine's 90 kills it.	Psychic Powers, then Geo Storm, kills the 340. Keep Xerneas off the Active until that finish. Psychic Powers alone kills Genesect ex at 220, and Miraculous Shine turns Metang back into Beldum, which shuts off Metal Maker.
Steve's Dragapult ex	Phantom Dive is 200 to the Active and 6 damage counters across your Bench. A Benched Dragapult ex is Tera, so Photon Bullets can't touch it.	Mewtwo ex lives through the 200 on 30. Psychic Powers, then any Geo Storm, kills its 320. Keep Eevee off the Bench.
Crustle	Mysterious Rock Inn prevents all damage from Pokémon ex. Superb Scissors is 120, which kills either Deoxys.	Xerneas and Deoxys aren't ex. Geo Storm at five Energy kills its 150, and Scissors leaves Xerneas on 10.

Versus Elliott's Garchomp

Elliott's deck is the hardest game in the room, and this is the best plan for it. Put the Cape on Mewtwo ex, and kill each Garchomp in two attacks: Psychic Powers for 230, then Geo Storm for 180 with Mewtwo's three and Xerneas's three in play.

Mewtwo ex resists Fighting by 30, so every Garchomp hit lands 30 short:

Elliott's attack	Into Mewtwo ex at 230	Cape'd, at 330
Corkscrew Dive, two Roserade, 130	dies to the second	dies to the third
Draconic Buster, no boosts, 230	dies	lives on 100
Draconic Buster, three boosts, 320	dies	lives on 10
Draconic Buster, four boosts, 350	dies	dies

Draconic Buster discards every Energy on that Garchomp. A Cape'd Mewtwo makes him spend two attachments and four boosts in one turn, and the next Garchomp starts from zero.
Xerneas has no Fighting Resistance. Corkscrew Dive with one Roserade is 130, exactly its HP. It finishes a Garchomp and is traded for it, 1 Prize for 2.
Meowth ex is his cheapest 2 Prizes. It has 170 HP, so Boss's Orders and Psychic Powers take it.
Each Roserade adds 30 to every hit. At 130 HP, one Psychic Powers kills a Roserade. When Corkscrew Dive starts killing Xerneas, take them first.
Don't damage his Bench while Spiritomb lives. Raging Curse does 10 for each damage counter on his Benched Cynthia's Pokémon, so Photon Bullets and the Bench half of Psyspear feed it. Use them only after Spiritomb is gone, or for the last Prize.
Espeon is the fallback when Geo Storm can't reach. A Garchomp holding 230 drops to a 170 HP Gabite and dies, and every Roserade drops to Roselia for that turn. It is 1 Prize, not 2.
Latias ex is 2 Prizes for his Boss's Orders. Draconic Buster kills it with no boosts. Bench it on a turn the free retreat pays for itself.

Test and Tune

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

Symptom: Fix
No Genome Charge on turn one most games: 4th Deoxys 031 over the Psyspear Deoxys
Geo Storm stuck short of 180 by turn three: 11th Basic Psychic Energy over a Poke Pad
Mewtwo ex stuck at two Energy on turn two: lead Deoxys harder; hold Energy Switch for that turn instead of playing it early
Latias ex keeps getting Boss'd for 2 Prizes: 2nd Switch over Latias ex, and pay the Retreat Costs
Espeon never gets to attack: cut to 2 Eevee and 1 Espeon; add Jacinthe and a 4th Mewtwo ex
Hands run dry after turn three: 4th Mystery Garden over Hilda
Elliott's Garchomp keeps winning: Jacinthe over Hilda
Steve's Dragapult keeps winning: Lillie's Clefairy ex over a Poke Pad

Alternatives

Card	Swaps for	Play it when
Mega Floette ex (Chaos Rising 101)	a Poke Pad	the house gets one. It is a Basic Mega with 250 HP, weak to Metal. Eternity Bloom is for 200, and it attaches up to 4 Basic Psychic Energy from the deck to your Bench: 120 more on the next Geo Storm. It gives up 3 Prizes.
Jacinthe (Perfect Order 110)	Hilda	Elliott. It heals 150 from one Psychic Pokémon, which resets a Cape'd Mewtwo ex after a Corkscrew Dive.
Lillie's Clefairy ex (Journey Together 056)	a Poke Pad	Steve's Dragapult. Fairy Zone makes every Dragon Pokémon weak to Psychic, so Psychic Powers does 460 to Dragapult ex. The house owns one.
Prime Catcher (ACE SPEC)	Hero's Cape	the games are lost to stranded attackers rather than to big hits. It gusts and switches in one Item.
Maximum Belt (ACE SPEC)	Hero's Cape	the Card Shop field is all ex. Psychic Powers does 280 to an Active Pokémon ex.
Sparkling Crystal (ACE SPEC)	never	it lowers attack costs only for a Tera Pokémon, and nothing here is Tera. It belongs in Rainbow DNA.
Espeon ex (30th Celebration 070)	an Espeon	the deck wants a third attacker. Solar Beatdown is for 30 per Pokémon you have in play, 180 with a full board. It is a 260 HP Stage 1 worth 2 Prizes.
Xerneas (Mega Evolution 064)	a Geo Storm Xerneas	the Bench fills too slowly. Geo Gate is : put up to 3 Basic Psychic Pokémon from the deck onto the Bench. It shares the four-copy limit.
Mewtwo (30th Celebration 063)	a Poke Pad	Energy keeps piling up in the discard pile. Empower is : attach up to 2 Basic Energy from the discard pile to one Pokémon. It is a different name from Mewtwo ex.
Mega Slowbro ex and Slowpoke (Pitch Black 031, 029)	Latias ex and a Poke Pad	Fox wants a wall. Shellnado Spin is for 180, and whatever damages it next turn takes 12 damage counters. It gives up 3 Prizes. Xero's, offered.
Mega Chandelure ex line (Pitch Black 036-038)	never	Xero's, offered. A Stage 2 Mega with its own engine, and every Bench seat here should hold Energy.
Mega Gardevoir ex	a different deck	Fox wants Geo Storm bigger. Mega Symphonia is for 50 per Psychic Energy in play, on a 360 HP Stage 2 Mega.