Omastar

Poké-PowerPrimal Swirl

Once during your turn, when you play Omastar from your hand to evolve 1 of your Pokémon, you may remove the highest Stage Evolution card from each of your opponent's Benched Evolved Pokémon and put those cards back into his or her hand. You can't use more than 1 Primal Swirl Poké-Power each turn.

Your opponent switches the Defending Pokémon with 1 of his or her Benched Pokémon.