Pokémon
Gateway to Ruin!
TV Flash files “Gateway to Ruin!” as hour 601 of 1220 in the TV Flash guide — Pokémon (1998–present (U.S.)) on Kids' WB/Syndication, season 12, episode 31, aired 2009-12-19, 22 min.
From the desk
How this hour is filed
This leaf is S12E31: listed hour 601 of 1220 in the Pokémon guide, hour 31 of 52 in season 12. It aired 2009-12-19 (22 min). The listed hour before it is “Beating the Bustle & Hustle!” (S12E30). Next is “Three Sides to Every Story!” (S12E32). Broadcast log — titles and dates, not a plot bible.

Catalog log
Broadcast listing — not a TV Flash recap.
Ash and friends are on their way to the town where Dawn's next contest will be held. They arrive at Mt. Coronet, the massive mountain that divides the Sinnoh region in half. The mountain also divides the region's pokémon, like Shellos. The Blue and Pink Shellos have ended up on the opposite side of the mountain, and while trying to figure out why, Piplup falls into an artificial tunnel, and when they go to rescue him, they come across something sinister.
Viewer FAQ
Where does Gateway to Ruin! sit in the Pokémon guide?
S12E31 is listed hour 601 of 1220 — hour 31 of 52 in season 12, season 12 episode 31.
When did Pokémon S12E31 air?
Gateway to Ruin! aired 2009-12-19 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…