Pokemon: Season 3, Episode 12

3 - 12: The Whistle Stop

When Team Rocket attacks Ash and his friends, a brave young Trainer and her flock of Ledyba come to the rescue. With a bolt of electricity, Pikachu makes quick work of Team Rocket, but they look to capture a prize anyway: the same bolt from Pikachu sends one of the Good Samaritan's Ledyba flying right into their clutches.