IL021: Bye Bye Butterfree

Synopsis
As the group continue on their way, they notice a group of Butterfree out over the ocean. Brock informs Ash that it is the mating season for all of the Butterfree. Ash lets his Butterfree out to try and find a mate, but can he actually come to let his Butterfree go? Meanwhile, Team Rocket comes up with a plan to get all the Butterfree.

Trivia

 * This is the first episode where Team Rocket's Motto gets ripped off
 * This is also the first episode where a main character releases a Pokemon
 * SPOILER: This the first episode where Ash releases a Pokemon
 * This episode is the first one where Team Rocket have thought's about Boss Fantasies - Where they think about stealing Pokemon and giving them to Giovanni
 * The English Title is a play on the musical Bye Bye Birdie