Sansronu

"''heh... you didn't really think I only had one health did you?" ''- Full-Out Sansronu during his fight.

Sansronu is the brother of Justayus and the underek version of Sans: http://undertale.wikia.com/wiki/Sans

Sansronu is a boss in the Pacifist and Genocide Routes.

Species/Appearance
Sansronu, unlike Undertale's Sans, isn't a skeleton. He's half skeleton and half narwhal.

Sansronu has rainbow coloured skin, which he claims is paint. When he dies, the colour drains from his body and he becomes completely white. He is often wearing headphones on his head. Sansronu, because he is a narwhal has a unicorn-like horn, however he doesn't appear to have flippers or any other narwhal features. He wears a blue t shirt and a black jacket with rainbow paint dripping down it. He has dark blue pants with white stripes on them and blue slippers... pink slippers?

Personality
Sansronu is lazy, apathic and slacks off a lot. However, he does care for Lusk and befriends him in the Pacifist Route and the Neutral Route if he doesn't kill Justayus. He loves puns, especially narwhal and skeleton related ones. Sansronu speaks in the Comic Sans and Sans Serif fonts and always in lower case characters. He is always smiling, "he can't help but smile in the face of danger."

Abilities
Sansronu has powers over space manipulation, granting him teleportation and other similar abilities. During the Full-Out Sansronu fight, he turns Lusk's soul to blue which applies a gravity effect. He can also pull the soul to the sides of the bullet board (jedi confirmed) and summon white and blue unicorn horns to damage Lusk.

Sansronu uses a creature called a Gastthew Blastthew, which he first pulls out of his pocket. After that, he spawns multiple Gastthew Blastthews to attack Lusk at once. Gastthew Blastthews shoots lasers out of their mouths and seem to be related to WD Gastthew in some way.

Backstory
Sansronu and Justayus were accidentally created by WD Gastthew during a determination experiment. It is believed that Gastthew took care of his 'sons' until he went mad and they went to live by themselves in Snowdin. Sansronu guards the gate between Snowdin and the Ruins when he is met by Lusk.

Full-Out Sansronu
Full-Out Sansronu is a boss fought on the Genocide Route.

Good Time Sansronu
Good Time Sansronu is an exclusive boss of the Pacifist Route and is significantly easier than Full-Out Sansronu.