Pokémon the Series: Sun & Moon · Sun & Moon arc
SM043 · When Regions Collide!
ジムバトル! Zワザ対メガシンカ!!
Synopsis
What happens.
As a part of their extracurricular lesson in Kanto, Ash and ashcl from the Pokémon School have arrived at the Cerulean Gym to learn about Gym battles. Upon entering the Gym, the group notices something standing in the middle of the battlefield, which Ash recognizes as Psyduck.
Synopsis adapted from Bulbapedia's SM043 entry, used under CC-BY-NC-SA 2.5.
Story arc · SM001-SM043
Sun & Moon.
Ash transfers to Pokémon School. Picks Litten; befriends Rockruff. Island Challenge concept introduced as a Pokédex-equivalent quest.
Read the full Sun & Moon guidePokémon featured · 20
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 Sun & Moon.
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.