Generation III Ability

Overgrow

Strengthens Grass moves to inflict 1.5× damage at 1/3 max HP or less.

Overgrow Effect

When this Pokémon has 1/3 or less of its HP remaining, its Grass-type moves inflict 1.5× as much regular damage.

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

Overgrow Data

Introduced
Generation III
Pokémon
29
In short
Strengthens Grass moves to inflict 1.5× damage at 1/3 max HP or less.

Pokémon With Overgrow

29 Pokémon can have Overgrow.

Hidden Ability

Overgrow Questions & Answers

What does Overgrow do?
When this Pokémon has 1/3 or less of its HP remaining, its Grass-type moves inflict 1.5× as much regular damage.
How many Pokémon have Overgrow?
29 Pokémon can have Overgrow.
What Pokémon have Overgrow?
Bulbasaur, Ivysaur, Venusaur, Chikorita, and Bayleef, and 24 more Pokémon can have Overgrow — the full list is above.
When was Overgrow introduced?
Overgrow was introduced in Generation III.