How to beat Mega Gengar ex

Mega Gengar ex has 1 version in the 2026–27 Standard format, with up to 350 HP as a Darkness Pokémon. Here's the maths for Knocking it Out — worked out from every Standard-legal card.

HP: 350

Weakness: Fighting

Resistance: None

Prizes: 3

One-hit KOs: 20

Fastest KO: 2 Energy

Game plan

Hit its Weakness. Mega Gengar ex is weak to Fighting, so those attacks do double damage. 20 Standard cards can Knock it Out in one hit that way — the fastest needs just 2 Energy.
Win the Prize trade. It gives up 3 Prize cards when Knocked Out. 11 single-Prize Pokémon can take it out in one attack, so you trade 1 Prize for 3.
Plan for its big hit. Its strongest printed attack is Void Gale for 230 (2 Energy). 130 Standard cards have enough HP to survive one hit — before any Weakness, + or × effects.
Watch the Retreat Cost. It costs 2 Energy to retreat. If it gets stuck in the Active Spot, that's your chance.

One-hit Knock Outs using Weakness

These Fighting attacks do at least 350 after Weakness. Fastest (fewest Energy) first.

Pokémon	Type	Attack	Damage	Damage to Mega Gengar ex	HP	Prizes
Mega Lucario ex Ascended Heroes	Fighting	Mega Brave FF	270	540	340	3
Cynthia's Garchomp ex Ascended Heroes	Fighting	Draconic Buster FF	260	520	330	2
Mamoswine ex Journey Together	Fighting	Rumbling March FF	180+	360	340	2
Mega Gallade ex Chaos Rising	Fighting	Marvelous Edge FFC	240	480	350	3
Hariyama Mega Evolution	Fighting	Wild Press FFF	210	420	150	1
Excadrill ex Black Bolt	Fighting	Rock Tumble FFF	200	400	270	2
Iron Boulder ex Temporal Forces	Fighting	Power Stomp FFC	200	400	240	2
Koraidon ex Ascended Heroes	Fighting	Impact Blow FFC	200	400	230	2
Mega Zygarde ex Perfect Order	Fighting	Gaia Wave FFF	200	400	310	3
Koraidon Pitch Black	Fighting	Gaia Impact FFC	190	380	130	1
Medicham ex Stellar Crown	Fighting	Yoga Kick FCC	190	380	260	2
Excadrill Temporal Forces	Fighting	Wild Tackle FFC	180	360	130	1

One-hit Knock Outs without Weakness

Attacks with a printed 350+ damage.

None in Standard right now.

Best Prize trades

Single-Prize Pokémon that Knock Out Mega Gengar ex in one attack — you give up 1 Prize, they give up 3.

Pokémon	Type	Attack	Damage	Damage to Mega Gengar ex	HP	Prizes
Hariyama Mega Evolution	Fighting	Wild Press FFF	210	420	150	1
Koraidon Pitch Black	Fighting	Gaia Impact FFC	190	380	130	1
Excadrill Temporal Forces	Fighting	Wild Tackle FFC	180	360	130	1
Rhyperior Stellar Crown	Fighting	Drill Run FCC	180	360	200	1
Probopass Perfect Order	Fighting	Obliterating Nose FFFC	260	520	140	1
Conkeldurr Twilight Masquerade	Fighting	Gutsy Swing FCCC	250	500	180	1
Coalossal Ascended Heroes	Fighting	Bulky Bump FCCC	220	440	180	1
Donphan Chaos Rising	Fighting	Smashing Headbutt FCCC	180	360	150	1

Pokémon that survive its biggest attack

These can take a printed 230 from Void Gale and stay in play (Weakness included). Single-Prize Pokémon first.

Pokémon	Type	Stage	HP	Weakness	Retreat	Prizes
Wailord Journey Together	Water	Stage 1	240	Lightning ×2	4	1
Wailord ex Pitch Black	Water	Stage 1	380	Lightning ×2	4	2
Mamoswine ex Journey Together	Fighting	Stage 2	340	Grass ×2	4	2
Palafin ex Prismatic Evolutions	Water	Stage 1	340	Lightning ×2	2	2
Slaking ex Surging Sparks	Colorless	Stage 2	340	Fighting ×2	4	2
Steven's Metagross ex Ascended Heroes	Metal	Stage 2	340	Fire ×2	3	2
Torterra ex Temporal Forces	Grass	Stage 2	340	Fire ×2	4	2
Tyranitar ex Prismatic Evolutions	Darkness	Stage 2	340	Grass ×2	3	2

Every Standard Mega Gengar ex card

Card	Set	HP	Stage	Attacks (cost · damage)	Retreat	Weakness
Mega Gengar ex 125/217 Ability: Shadowy Concealment	Ascended Heroes I	350	Stage 2	Void Gale DD 230	2	Fighting ×2

Damage is the number printed on the card. Attacks marked + or × can do more, and Abilities, Tools and Stadiums can change the maths — always read the card. Energy letters: G Grass, R Fire, W Water, L Lightning, P Psychic, F Fighting, D Darkness, M Metal, N Dragon, C Colorless (any Energy).

Questions people ask

What is Mega Gengar ex weak to?

Mega Gengar ex is weak to Fighting, so those attacks do double damage (×2).

How much HP does Mega Gengar ex have?

Up to 350 HP in Standard.

How many Prize cards does Mega Gengar ex give up?

3 — it's a Mega Evolution Pokémon ex.

What can one-hit KO Mega Gengar ex?

20 Standard cards can, going by printed damage. The fastest: Mega Lucario ex's Mega Brave (2 Energy, 540 damage); Cynthia's Garchomp ex's Draconic Buster (2 Energy, 520 damage); Mamoswine ex's Rumbling March (2 Energy, 360 damage).

What is Mega Gengar ex's strongest attack?

Void Gale, which prints 230 damage for 2 Energy.

Pully Play is an independent fan guide. It isn't run by The Pokémon Company. Format facts are checked against official announcements; always confirm card legality with the official rules before a tournament.

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