Restores a little HP when withdrawn from battle.
Regenerator is an ability introduced in Generation V. So far, 7 Pokémon have this ability.
Regenerator restores ⅓ of the bearer's maximum HP upon switching out in battle. That includes manually switching out to an ally Pokémon, being forced to send another Pokémon by the effect of Roar and Dragon Tail, and the effects of Baton Pass, U-turn, Volt Switch and Parting Shot.
Outside of battle
Regenerator has no effect outside of battle.
Pokémon with Regenerator