[PKM] Phione (SM220) (Staff Prerelease Promo) [Sun & Moon: Black Star Promos]

Once during your turn (before your attack), if this Pokémon is on your Bench, you may have your opponent switch their Active Pokémon with 1 of their Benched Pokémon. If you do, discard all cards attached to this Pokémon and put it on the bottom of your deck.