In this AU, Charas resets corrupted all save files, resulting in the fun value to be over 100. this also destroyed many of the monsters in the underground, resulting in them having missing parts, or (in the case of sans) the ability to discharge determination as fire and other things, and an inability to die. This also resulted in the gaster blasters to look different, assuming a smaller shape, and making them easier to dodge. Sans hates almost everyone (with the exception of undyne, alphys, papyrus, gaster, and toriel)
Creds to @CattyCodes for part of the head and the hood thingy space for next costume
