• Whirlwind

  20

  Your opponent switches the Defending Pok?mon with 1 of his or her Benched Pok?mon, if any.(Do the damage before switching the Pok?mon.)

• Mega Drain

  40

  Remove a number of damage counters from Butterfree equal to half the damage done to the Defending Pok?mon(after applying Weakness and Resistance)(rounded up to the nearest 10). If Butterfree has fewer damage counters than that, remove all of them.

In battle, it flaps its wings at high speed to release highly toxic dust into the air.