Generation Ix
Toxic Chain
The power of the Pokémon's toxic chain may badly poison any target the Pokémon hits with a move
Detailed Effect
The power of the Pokémon's toxic chain may badly poison any target the Pokémon hits with a move.
Pokémon With Toxic Chain
3 canonical Pokémon forms can have this Ability.

Okidogi 
Munkidori
Fezandipiti