Some wanted a blanket monster Papyrus to go with blanket monster Sans and who am I to say no, haha. It's no fun to play this game with Sans though, he just stands there and lets you (well, Papyrus, no one else) get him. So lazy!
(sans only goes after papyrus, in turn)
Pretty rich for him to talk about bad upbringings. Not pictured: Toriel potentially getting jumped by a blanket monster.
Getting flushed and red is normal post-tickling, this is entirely platonic.
Undyne eventually stopped the reign of terror