Once during your turn, when you play Gengar from your hand to evolve 1 of your Pokémon, you may flip a coin. If heads, choose 1 of your opponent's Pokémon. Your opponent returns that Pokémon and all cards attached to it to his or her hand.

Flip a coin. If heads, the defending Pokemon is now Asleep. If tailsn the Defending Pokemon is now Confused