How to beat Mega Greninja ex
Mega Greninja ex has 1 version in the 2026–27 Standard format, with up to 350 HP as a Water Pokémon. Here's the maths for Knocking it Out — worked out from every Standard-legal card.
- HP
- 350
- Weakness
- Lightning
- Resistance
- None
- Prizes
- 3
- One-hit KOs
- 19
- Fastest KO
- 2 Energy
Game plan
- Hit its Weakness. Mega Greninja ex is weak to Lightning, so those attacks do double damage. 19 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. 7 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 Ninja Spinner for 120+ (2 Energy). 533 Standard cards have enough HP to survive one hit — before any Weakness, + or × effects.
- Watch the Retreat Cost. It costs 1 Energy to retreat. If it gets stuck in the Active Spot, that's your chance.
One-hit Knock Outs using Weakness
These Lightning attacks do at least 350 after Weakness. Fastest (fewest Energy) first.
| Pokémon | Type | Attack | Damage | Damage to Mega Greninja ex | HP | Prizes |
|---|---|---|---|---|---|---|
| Vikavolt Pitch Black | Lightning | Giga Railgun LL | 260 | 520 | 160 | 1 |
| Luxray ex Twilight Masquerade | Lightning | Volt Strike LL | 250 | 500 | 310 | 2 |
| Electivire Stellar Crown | Lightning | Unleash Lightning LL | 220 | 440 | 150 | 1 |
| Pikachu ex Ascended Heroes | Lightning | Topaz Bolt GLM | 300 | 600 | 200 | 2 |
| Jolteon ex Prismatic Evolutions | Lightning | Dravite RWL | 280 | 560 | 260 | 2 |
| Revavroom ex Shrouded Fable | Lightning | Shattering Speed MMM | 250 | 500 | 280 | 2 |
| Pikachu ex Prismatic Evolutions | Lightning | Thunder LLC | 220 | 440 | 190 | 2 |
| Luxray Perfect Order | Lightning | Strong Volt LCC | 200 | 400 | 150 | 1 |
| Pikachu ex 30th Celebration | Lightning | Thunderbolt LLC | 200 | 400 | 190 | 2 |
| Pikachu ex 30th Celebration | Lightning | Thunder LLC | 200 | 400 | 190 | 2 |
| Mega Manectric ex Mega Evolution | Lightning | Riotous Blasting LLL | 200+ | 400 | 330 | 3 |
| Zapdos Twilight Masquerade | Lightning | Thunderbolt LLC | 190 | 380 | 120 | 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 Greninja ex in one attack — you give up 1 Prize, they give up 3.
| Pokémon | Type | Attack | Damage | Damage to Mega Greninja ex | HP | Prizes |
|---|---|---|---|---|---|---|
| Vikavolt Pitch Black | Lightning | Giga Railgun LL | 260 | 520 | 160 | 1 |
| Electivire Stellar Crown | Lightning | Unleash Lightning LL | 220 | 440 | 150 | 1 |
| Luxray Perfect Order | Lightning | Strong Volt LCC | 200 | 400 | 150 | 1 |
| Zapdos Twilight Masquerade | Lightning | Thunderbolt LLC | 190 | 380 | 120 | 1 |
| Vikavolt Ascended Heroes | Lightning | Sparking Strike LLCC | 240 | 480 | 160 | 1 |
| Zapdos 30th Celebration | Lightning | Thundering Lightning LLLC | 210 | 420 | 120 | 1 |
| Magnezone Surging Sparks | Lightning | Zap Cannon LCCC | 180 | 360 | 170 | 1 |
Pokémon that survive its biggest attack
These can take a printed 120+ from Ninja Spinner 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 |
| Copperajah Shrouded Fable | Metal | Stage 1 | 200 | Fire ×2 | 4 | 1 |
| Rhyperior Stellar Crown | Fighting | Stage 2 | 200 | Grass ×2 | 4 | 1 |
| Steelix Mega Evolution | Metal | Stage 1 | 200 | Fire ×2 | 4 | 1 |
| Copperajah Journey Together | Metal | Stage 1 | 190 | Fire ×2 | 4 | 1 |
| Tyranitar Journey Together | Darkness | Stage 2 | 190 | Grass ×2 | 3 | 1 |
| Aggron Twilight Masquerade | Metal | Stage 2 | 180 | Fire ×2 | 3 | 1 |
| Alolan Golem Journey Together | Lightning | Stage 2 | 180 | Fighting ×2 | 4 | 1 |
Every Standard Mega Greninja ex card
| Card | Set | HP | Stage | Attacks (cost · damage) | Retreat | Weakness |
|---|---|---|---|---|---|---|
| Mega Greninja ex 22/86 Ability: Mortal Shuriken | Chaos Rising J | 350 | Stage 2 | Ninja Spinner WW 120+ | 1 | Lightning ×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).
Related: all Greninja cards in Standard · how to knock out a 350 HP Pokémon · Lightning vs Water · beating big Pokémon ex · more counter guides
Questions people ask
What is Mega Greninja ex weak to?
Mega Greninja ex is weak to Lightning, so those attacks do double damage (×2).
How much HP does Mega Greninja ex have?
Up to 350 HP in Standard.
How many Prize cards does Mega Greninja ex give up?
3 — it's a Mega Evolution Pokémon ex.
What can one-hit KO Mega Greninja ex?
19 Standard cards can, going by printed damage. The fastest: Vikavolt's Giga Railgun (2 Energy, 520 damage); Luxray ex's Volt Strike (2 Energy, 500 damage); Electivire's Unleash Lightning (2 Energy, 440 damage).
What is Mega Greninja ex's strongest attack?
Ninja Spinner, which prints 120+ 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.