He then follows Sans around mostly in their puzzles for the protagonist. Like Undertale Sans, he tells them to hide from Sans who berates Papyrus for being lazy and smoking. Papyrus meets the protagonist after they enter Sunnedout forest.

In Papyrus' battle, it replaces the HP having it say KR. It is very difficult to get off and its better to use food then waiting for it to leave. Karmic Retribution is like poison, it is left on the player everytime they hit an attack from Papyrus. Papyrus is the most difficult opponent of all the enemies in Underswap. Like Sans, his powers mostly involve bones and Gaster Blasters, and is more tense than the other battles in the game. He can also invoke Gaster Blasters, which are unique skulls firing a powerful Spaghetti beam, as well as having telekinesis and the unique ability to know of the RESET and its effects.

Papyrus has the ability to dodge attacks, and excels in combat and fights with unique abilities that include: Karmic Retribution, changing the effect of gravity on the SOUL and attacking the protagonist in the selection menus. Papyrus is quite protective of his brother despite his chill attitude and his brother's hate for his jokes. Papyrus is considerate, as well as having lots of respect. Although his brother Sans is not happy with his vague attitude. Papyrus is a calm, lazy and even fun character, but he can become very serious in situations that require it. He also wears orange (but is sometimes drawn wearing slippers) shoes with white laces and is often seen smoking, in fanarts and sprites of him. Papyrus is a tall skeleton wearing an orange hooded jacket and beige shorts. He is an important support in the Neutral Route and True Pacifist Route, as well as the final boss of the Genocide Route.

Underswap papyrus