Devolution Spray 72/102 (1st Edition Shadowless)

Trainer

Choose 1 of your own Pokémon in play and a Stage of Evolution. Discard all Evolution cards of that Stage or higher attached to that Pokémon. That Pokémon is no longer Asleep, Confused, Paralyzed, Poisoned, or anything else that might be the result of an attack (just as if you had evolved it).