Pokémon the Series: Sun & Moon · Sun & Moon Ultra Adventures arc
SM057 · The Dex Can't Help It!
ロトム、フォルムチェンジが止まらない！
Synopsis
What happens.
Ash, Professor Kukui, and Professor Burnet prepare to leave the house to go to the local shops, while Rotom Pokédex will stay behind to look after the currently sleeping Pokémon. Rotom waves the trio goodbye and uses the opportunity to snap images of the napping Pokémon.
Synopsis adapted from Bulbapedia's SM057 entry, used under CC-BY-NC-SA 2.5.
Story arc · SM044-SM092
Sun & Moon Ultra Adventures.
Ultra Beasts arc. The Aether Foundation's plot deepens; Lusamine's Nihilego possession arc lands. Ash captures Lycanroc and Naganadel.
Read the full Sun & Moon guidePokémon featured · 18
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 Ultra Adventures.
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.