How to beat Meganium

Meganium has 1 version in the 2026–27 Standard format, with up to 160 HP as a Grass Pokémon. Here's the maths for Knocking it Out — worked out from every Standard-legal card.

Game plan

1. Hit its Weakness. Meganium is weak to Fire, so those attacks do double damage. 72 Standard cards can Knock it Out in one hit that way — the fastest needs just 1 Energy.
2. Don't over-invest. It only gives up 1 Prize card, so avoid spending a big two-Prize attacker on it if a cheaper Pokémon can do the job.
3. Plan for its big hit. Its strongest printed attack is Solar Beam for 140 (4 Energy). 345 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 Fire attacks do at least 160 after Weakness. Fastest (fewest Energy) first.

One-hit Knock Outs without Weakness

Attacks with a printed 160+ damage.

Pokémon that survive its biggest attack

These can take a printed 140 from Solar Beam and stay in play (Weakness included). Single-Prize Pokémon first.

Every Standard Meganium 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 Meganium cards in Standard · how to knock out a 160 HP Pokémon · Fire vs Grass · beating big Pokémon ex · more counter guides