Pokémon
Bye Bye Butterfree
TV Flash files “Bye Bye Butterfree” as hour 21 of 1220 in the TV Flash guide — Pokémon (1998–present (U.S.)) on Kids' WB/Syndication, season 1, episode 21, aired 1997-08-19, 22 min.
From the desk
How this hour is filed
This leaf is S01E21: listed hour 21 of 1220 in the Pokémon guide, hour 21 of 82 in season 1. It aired 1997-08-19 (22 min). The listed hour before it is “The Ghost of Maiden's Peak” (S01E20). Next is “Abra and the Psychic Showdown” (S01E22). Broadcast log — titles and dates, not a plot bible.

Catalog log
Broadcast listing — not a TV Flash recap.
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.
Viewer FAQ
Where does Bye Bye Butterfree sit in the Pokémon guide?
S01E21 is listed hour 21 of 1220 — hour 21 of 82 in season 1, season 1 episode 21.
When did Pokémon S01E21 air?
Bye Bye Butterfree aired 1997-08-19 and is listed at 22 minutes.
Do I need the games first?
The TV series is one engine with the games and cards, not a homework prerequisite. U.S. breakthrough is 1998 anime syndication as childhood OS.
In the series
Why this series still plays
A ten-year-old, a yellow mouse, and a globetrotting checklist that became a childhood operating system. Anime lands in American syndication as one engine with the games and cards — catch, train, argue about types. Kids’ TV as collection ritual, gym-badge serialization, and the rare cartoon that still prints money because the adventure never quite finishes.
The work, first: a young trainer, a yellow mouse, a globetrotting checklist that became a childhood operating system. Based on Game Freak/Nintendo games, the anime's U.S. TV breakthrough in 1998 (Kids' WB and syndication) detonated a multi-platform kids' empire: games, cards, films, toys, one engine. Satoshi Tajiri and Kunihiko Yuyama's world turned anime into mainstream American children's programming. Rica Matsumoto and Veronica Taylor as Ash across languages; Ikue Otani's Pikachu. Catch, train, argue about…
Filed against
- Rica Matsumoto as Ash Ketchum (JP)
Rica Matsumoto voices Ash Ketchum on Pokémon — the ten-year-old whose globetrotting checklist became a childhood operating system in Japanese, then a syndication engine abroad. Catch, train, argue about types. TV Flash files her as 1990s…
- Veronica Taylor as Ash Ketchum (US early)
Veronica Taylor was early U.S. Ash Ketchum on Pokémon — a ten-year-old, a yellow mouse, a globetrotting checklist that became a childhood operating system. Anime landed in American syndication as one engine with the games and cards:…
- Ikue Otani as Pikachu
Ikue Otani voiced Pikachu as a childhood operating system — a ten-year-old, a yellow mouse, anime landing in American syndication as one engine with the games and cards. Catch, train, argue about types. TV Flash files her as 1990s kids-TV…