The article Papyrus either has inappropriatehumor or no funniness at all, maybe even both. What if you're improving the article by adding right humor right now? Just do it!
Reason: Rewrite this page, so we need MOARSpaghettihumerus. Also, do you have zero redeeming qualities?
He seems to have an interest of joining the royal guard, and to do that he must capture a human first. He also loves spaghetti which he cooks for them. (Eventually his spaghetti tasted unnatural.) He loves puzzles and japes which he wants them to pass his challenges, but failed. Although, he seems to be worried about Sans, because Sans only have a base stat of one.