Overgrow

Powers up Grass-type moves when the Pokémon's HP is low.

Pokémon with this ability28 Pokémon

FAQ

What does Overgrow do?

Powers up Grass-type moves when the Pokémon's HP is low.

Which Pokémon have Overgrow?

28 Pokémon have it, e.g. Bulbasaur, Ivysaur, Venusaur, Chikorita, Bayleef, Meganium, Treecko, Grovyle.