Attacks
Whirlwind
Colorless, Colorless | 20 damage
If your opponent has any Benched Pokémon, he or she chooses 1 of them and switches it with the Defending Pokémon. (Do the damage before switching the Pokémon.)
Mega Drain
Grass, Grass, Grass, Grass | 40 damage
Remove a number of damage counters from Butterfree equal to half the damage done to the Defending Pokémon (after applying Weakness and Resistance) (rounded up to the nearest 10).