Regenerator
Heals for 1/3 max HP upon switching out.
Full effect
This Pokémon regains 1/3 of its maximum HP when it is switched out for another Pokémon under any circumstances other than having fainted. This ability does not take effect when a battle ends.
In-game description
The Pokémon has a little of its HP restored when withdrawn from battle.
Stats
Regular ability (6 Pokémon)
Hidden ability (17 Pokémon)
Only available through specific encounters (Dynamax Adventures, Tera Raids, hidden grottoes, etc.).