During Ash's Gym match with Koga, Koga sent Venonat, who immediately evolved into a Venomoth.
Venomoth launched Stun Spore, which Pidgeotto could not blow away with Whirlwind. After Pidgeotto got affected by the move, Venomoth emitted Sleep Powder. Ash sent Charmander out, who blocked Venomoth's Sleep Powder with Flamethrower. Before the battle could continue, Team Rocket arrived and interrupted the battle.