Nuzzus, a portmanteau of "Sussus" and "Nuzzus", is the opponent of Sussus Nuzzus. Nuzzus appears almost identical to Red Impostor, only in an Earthbound/SNES era pixel art style and being white in color. " No More Nuzzles" is a song from UNDERTALE: Halloween Hack, a combination of UNDERTALE and one of Toby Fox's older works, EARTHBOUND: Halloween Hack. UNDERTALE: Halloween Hack is a ROM Hack, and an unofficial crossover between the two. Lunaxis, the original composer of "No More Nuzzles", composed Sussus Nuzzus. There was a hoax created by Ethan on a tweet, showing gameplay of a song with the same name, however the credits says that Toby Fox(creator of Undertale and Deltarune) made the song.

More facts here: https://fridaynightfunking.fandom.com/wiki/VS._Impostor#undefined