Pokémon: Advanced Generation · Advanced arc

AG021 · Which Wurmple's Which?

Name: Which Wurmple's Which?
Released: 2004-02-14

ケムッソVSケムッソ! どっちがどっち!?

US air. 2004-02-14 JP air. 2003-04-17 Season. Advanced (S6) Position. Episode 21 of 192 in Advanced Generation

Synopsis

What happens.

At the Dewford Island Pokémon Center, May is the first to wake up, and she quickly alerts Max and Brock to Ash's odd disappearance.

Synopsis adapted from Bulbapedia's AG021 entry, used under CC-BY-NC-SA 2.5.

Story arc · AG001-AG040

Advanced.

Ash arrives in Hoenn, meets May and Max in Littleroot, picks up Treecko, and starts the Hoenn badge run. Team Magma and Team Aqua replace Team Rocket as primary threats.

Read the full Advanced Generation guide

Pokémon featured · 12

Who appears.

Linked entries open the species page on the Pokédex. Items without a sprite (alternate forms, regional variants, generic group references) fall back to a name pill.

Other episodes in Advanced.

Episode synopsis from Bulbapedia, CC-BY-NC-SA 2.5. Editorial context (arc affiliation, cultural moments, character signatures) hand-verified May 2026. Pokémon, character names, and series titles © Nintendo, Game Freak, Creatures Inc., The Pokémon Company, OLM Inc. This is an unofficial fan reference.