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How to beat Vaporeon ex

Vaporeon ex has 1 version in the 2026–27 Standard format, with up to 280 HP as a Water Pokémon. Here's the maths for Knocking it Out — worked out from every Standard-legal card.

HP

280

Weakness

Lightning

Resistance

None

Prizes

2

One-hit KOs

43

Fastest KO

2 Energy

Game plan

1. Hit its Weakness. Vaporeon ex is weak to Lightning, so those attacks do double damage. 32 Standard cards can Knock it Out in one hit that way — the fastest needs just 2 Energy.
2. Win the Prize trade. It gives up 2 Prize cards when Knocked Out. 18 single-Prize Pokémon can take it out in one attack, so you trade 1 Prize for 2.
3. Plan for its big hit. Its strongest printed attack is Aquamarine for 280 (3 Energy). 60 Standard cards have enough HP to survive one hit — before any Weakness, + or × effects.
4. 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 Lightning attacks do at least 280 after Weakness. Fastest (fewest Energy) first.

One-hit Knock Outs without Weakness

Attacks with a printed 280+ damage.

Best Prize trades

Single-Prize Pokémon that Knock Out Vaporeon ex in one attack — you give up 1 Prize, they give up 2.

Pokémon that survive its biggest attack

These can take a printed 280 from Aquamarine and stay in play (Weakness included). Single-Prize Pokémon first.

Every Standard Vaporeon ex card

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 Vaporeon cards in Standard · how to knock out a 280 HP Pokémon · Lightning vs Water · beating big Pokémon ex · more counter guides

Questions people ask

What is Vaporeon ex weak to?

Vaporeon ex is weak to Lightning, so those attacks do double damage (×2).

How much HP does Vaporeon ex have?

Up to 280 HP in Standard.

How many Prize cards does Vaporeon ex give up?

2 — it's a Pokémon ex.

What can one-hit KO Vaporeon ex?

43 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 Vaporeon ex's strongest attack?

Aquamarine, which prints 280 damage for 3 Energy.