Generation Iv
Poison Heal
Restores HP if the Pokémon is poisoned.
Detailed Effect
If this Pokémon is poisoned, it will heal for 1/8 of its maximum HP after each turn rather than taking damage. This includes bad poison.
Pokémon With Poison Heal
3 canonical Pokémon forms can have this Ability.
Shroomish 
Breloom 
Gliscor 
