Regenerator

Regenerator is an ability that allows a Pokémon to restore a portion of its maximum HP when it is switched out of battle. Specifically, Regenerator heals the Pokémon by 1/3 of its maximum HP upon being withdrawn. This makes it a highly valuable ability for maintaining longevity and sustaining momentum in battles, as it encourages more strategic switching and can minimize the damage taken across multiple turns.

Regenerator is especially useful for Pokémon that play defensive or supportive roles, as it allows them to stay healthy over the course of a battle and perform their roles for longer periods. Notable Pokémon that possess the Regenerator ability include Slowbro, Tangrowth, and Mienshao. These Pokémon can effectively use their ability to pivot in and out of battle, healing themselves incrementally while continuing to exert pressure or provide support for their teammates.

An interesting aspect of Regenerator is how it interacts with other game mechanics, such as status conditions. If a Pokémon with Regenerator is afflicted with a status like burn or

Effects

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.

Flavor Texts

black-white: Restores a little HP when withdrawn from battle.
black-2-white-2: Restores a little HP when withdrawn from battle.
x-y: Restores a little HP when withdrawn from battle.
omega-ruby-alpha-sapphire: Restores a little HP when withdrawn from battle.
sun-moon: Restores a little HP when withdrawn from battle.
ultra-sun-ultra-moon: Restores a little HP when withdrawn from battle.
lets-go-pikachu-lets-go-eevee: Restores a little HP when withdrawn from battle.
sword-shield: Restores a little HP when withdrawn from battle.
scarlet-violet: The Pokémon has a little of its HP restored when withdrawn from battle.