So! I just found a CLEAR reference to Undertale in Smash Ultimate - Super Smash Bros. Ultimate Forum - Neoseeker Forums

So, I've been binging smash ultimate since it come out. And the only Challenge i have left to complete is the 200 quickpl

Super sans Bros Ultimate Modpack [Super Smash Bros. Ultimate] [Mods]

Steam Workshop::Super Smash Bros. Ultimate: Sans (No Gun)

Guide to beating 'The True Arena' (Guide Completed!) (Spoiler Free

Guide to beating 'The True Arena' (Guide Completed!) (Spoiler Free

Is this a sans reference in Smash Ultimate? : r/Undertale

Every Undertale Reference in the Sans Reveal Trailer for Super

Guide to beating 'The True Arena' (Guide Completed!) (Spoiler Free

Mafia Universe Awards 2022 - Nominations

Female character designs without the fan service (Read OP)

Is this a sans reference in Smash Ultimate? : r/Undertale

Guide to beating 'The True Arena' (Guide Completed!) (Spoiler Free

Guide to beating 'The True Arena' (Guide Completed!) (Spoiler Free

Mafia Universe Awards 2022 - Nominations

Super sans Bros Ultimate Modpack [Super Smash Bros. Ultimate] [Mods]