Undertale AU's

Sans AU's get invited to a party, any Sans can join, anytime. the party takes place in an empty anti-void! you can make any Sans AU come to this party, costume, or original. about him: he is Classic Sans, the Classic Sans of all Sanses around the multivers. he is lazy, loves puns, and is the older brother of Papyrus. he decided to come to this all Sans party, and see what types of other hims there were. you can be ANY Sans AU you can be multiple Sanses. thanks! OwO