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

Smash or Pass Meaning & Origin

Smash or Pass – Bold Cards

Smash meaning of Smash

Smash First Name Personality & Popularity

Smash Avo | Funny Australian slang, phrase and humor definition | Art Board Print

SMASH - Save Motorcyclists and Support Helmets Coalition by

smash - Sydney Men and Sexual Health by

Crush vs Smash: Meaning And Differences

Day 18 of getting every Smash amiibo: R.O.B., Mr. Game & Watch, and Duck Hunt! Been meaning to get this three pack for a while and when I saw a listing of

What is the meaning of You're the smash, I am the grab.? - Question about English (US)