Pokémon: Advanced Generation · Advanced Battle arc
AG142 · Caterpie's Big Dilemma
進化！その神秘と奇跡！！
Synopsis
What happens.
As Ash and his friends head for Saffron City, an angry Caterpie suddenly pops out from the bushes. Curious about it, May brings out her Pokédex. Zander appears and accuses the group of being thieves, so he has his Caterpie tie them up with a String Shot.
Synopsis adapted from Bulbapedia's AG142 entry, used under CC-BY-NC-SA 2.5.
Story arc · AG093-AG145
Advanced Battle.
Hoenn League prep. Ash completes the badge set; Team Aqua / Magma plot escalates with Kyogre and Groudon. Climax: Hoenn League at Ever Grande City.
Read the full Advanced Generation guidePokémon featured · 11
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.
More from this arc
Other episodes in Advanced Battle.
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.