Genocide Papyrus

Papyrus is a tall, perhaps anatomically inaccurate skeleton, with a skull more vertical and geometric than his brother. Being skeletal, many of his expressions incorporate a toothy grin. His right eye is brighting in orange in anger; his skeletal pseudo-brows form most of his expressions, as well as the corners of his mouth. He has eyeballs which show at times when he is experiencing strong emotions. Papyrus is relatively taller and slightly slimmer than his brother.

Papyrus wears his "battle body," an outfit that he created for a costume party. It consists of an orange-red cape, a white chestplate with a gold trim on the bottom, and blue briefs with a golden belt. A symbol that resembles that of Starman from the MOTHER series adorns the chestplate. He also wears red coquelicot gloves, each with a yellow trim, red boots and the open blue hoodie that Sans used to wear.

A speed-oriented style that is inspired by Sanda. The Rush style is best known for its ability to stun enemies with Dempsey Roll-like bursts of relentless blows, as well as its emphasis on Papyrus's speed and footwork. His movement speed is greatly increased while using this style. All attacks in Rush style are performed at near-instant speeds, with even the slowest and most powerful blows still fast enough to hit enemies before they can put up their guard.

-a Rush Combo, made up of a left jab-right hook, a right front snap kick-right backfist, and a rapid low right backfist-right backfist-left hook-right uppercut;
-a second combo, made up of a low right roundhouse kick, a right hook-right backfist, and a left front snap kick-high left roundhouse kick;
-a left side kick,
-a left jab and a double-fisted punch, before assuming a karate middle-block back stance;
-a flying right-left front kick-left jab-spinning right backfist.

quickstep attacks, including:
-a right cross-left hook-right cross after forward-stepping,
-a right/left hook-high right/left side kick after sidestepping right/left respectively, and
-a left snap kick-spinning right heel kick after backstepping.

weave attacks, including:
-a left jab-right hook after weaving right, and
-a low right roundhouse kick after weaving left;
-a command grab where he does a shuffle followed by a low right Thai roundhouse kick, performing a rapid left gut punch-right gut punch-right backfist-left hook-left backfist-right uppercut-right side kick combo that knocks his enemy down if said kick lands;
-a right punt kick as a downed attack, and
-a taunt where he drops his stance and holds his arms out by his sides.

After the protagonist, repeatedly play through a Genocide Route, Sans gets sick of watching Papyrus, and his friends turn to dust and die, so he finally decides to interfere. He stops Papyrus from fighting the human in Snowdin, and tries to fight him/her himself, but dies, leaving Papyrus to watch all of his friends die with his own eyes.

Instead of meeting Sans in the Last Corridor, the human meet Papyrus, and the events from this time on lead up to his fight with the human.

At this point, Papyrus has lost all the belief and faith that he had that humans could be good, and is now out to get revenge for the death of his brother, and friends.