Pokémon
When Regions Collide!
TV Flash files “When Regions Collide!” as the last listed hour of season 20 — Pokémon (1998–present (U.S.)) on Kids' WB/Syndication, season 20, episode 43, aired 2017-09-21, 30 min.
From the desk
How this hour is filed
This leaf is S20E43: listed hour 981 of 1220 in the Pokémon guide, last listed hour of season 20. It aired 2017-09-21 (30 min). The listed hour before it is “Alola, Kanto!” (S20E42). Next is “A Dream Encounter!” (S21E01). Broadcast log — titles and dates, not a plot bible.

Catalog log
Broadcast listing — not a TV Flash recap.
Still in Kanto, the group heads to Cerulean City to teach the Alola group about Pokémon Gyms. Having had his last match at Cerulean Gym interrupted, Ash is eager to have a proper match as demonstration, and Kiawe also wants to battle. As such, battles soon begin of Ash VS Misty and Kiawe VS Brock, but when they start to use their Z-Moves, Brock & Misty pull out their trump cards: Mega Evolution. Will Ash manage to push through the Mega Gyarados' strength with his Z-Move?
Viewer FAQ
Where does When Regions Collide! sit in the Pokémon guide?
S20E43 is listed hour 981 of 1220 — last listed hour of season 20, season 20 episode 43.
When did Pokémon S20E43 air?
When Regions Collide! aired 2017-09-21 and is listed at 30 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…