Eject Button

“An item to be held by a Pokémon. If the holder is damaged by an attack, it will be switched out of battle to be replaced by another Pokémon on your team.”

“An item to be held by a Pokémon. If the holder is hit by an attack, it will be switched out of battle.”

“If the holder is hit by an attack, it will switch with another Pokémon in your party.”