Aftermath

Works differently in PBF

In PBF's battle code this never goes off: a contact move that knocks this Pokémon out does not hurt the attacker.

Standard ability
4
Pokémon
Hidden ability
4
Pokémon

In the main games

If this Pokémon is knocked out with a contact move, that move's user loses 1/4 of its maximum HP, rounded down. This effect is prevented if the move's user has the Magic Guard Ability or if any active Pokémon has the Damp Ability.

Pokémon that can have it

8

Standard ability4Any one caught or hatched may have it

Hidden ability4Only one with its hidden ability has it