overgrow
Generation IiiWhen this Pokémon has 1/3 or less of its HP remaining, its grass-type moves inflict 1.5× as much regular damage.
Pokémon with this ability (29)
H = Hidden ability
When this Pokémon has 1/3 or less of its HP remaining, its grass-type moves inflict 1.5× as much regular damage.
H = Hidden ability