In addition to coming to GamePass, a physical edition of Undertale will also be releasing for Xbox via Fangamer (regular or collector's edition) : r/XboxSeriesX
Aidan Moher on X: "Snagged physical copies of two modern classics: Celeste by @exok_games and @tobyfox's Undertale. Many thanks to @VideoGamesPlus_ for making it easy to buy indie games in Canada. https://t.co/CR9XakN4yo" /
Physical Copies of Undertale are Now Available! | PNP Games
Undertale for Nintendo Switch - Nintendo Official Site
UNDERTALE Collector's Editions - Fangamer
Undertale (Nintendo Switch) – RetroMTL
Amazon.com: Undertale Nintendo Switch Standard Edition [Physical] : Video Games
Undertale - Nintendo Switch | Nintendo Switch | GameStop
Amazon.com: Undertale Nintendo Switch Standard Edition [Physical] : Video Games