Pokémon the Series: Sun & Moon · Sun & Moon arc

SM027 · A Glaring Rivalry!

出でよ! 紅き眼差しルガルガン!!

US air. 2017-08-19 JP air. 2017-05-18 Season. Sun & Moon (S20) Position. Episode 27 of 146 in Sun & Moon

Synopsis

What happens.

Team Skull Grunts Tupp, Rapp, and Zipp are in an alleyway when Gladion walks past along with his Umbreon. They confront Gladion, but Gladion keeps on walking and demand that he leave his Umbreon with them.

Synopsis adapted from Bulbapedia's SM027 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 guide

Pokémon 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.