Pokepedia
Generation III Ability

Immunity

Effect, usage, and Pokémon with this ability.

Immunity is a Pokémon ability introduced in Generation III. Prevents poison.

Full effect

This Pokémon cannot be poisoned. This includes bad poison. If a Pokémon is poisoned and acquires this ability, its poison is healed; this includes when regaining a lost ability upon leaving battle.

The Pokémon's immune system prevents it from being poisoned.

Pokémon with Immunity

3 Pokémon
Regular ability (2)
Hidden ability (1)