Sans Into the Sans-Verse

In the Nullverse-000: Nullverse-18835, existed a place called Sans-Verse. It was called like that because most of its characters were a Sans from Undertale or its numerous timelines and alternative universes.

Everything started in Undertale Timeline 88269, also called Universe 7825299925. It was an average Genocide Route but when the human got to The Last Corridor, also called the Judgment Hall, a hole opened and a Sans appeared next to the Sans of this Timeline. The other Sans was entirely covered in grey, white and black nuances.

"Who are you?" Sans asked.

"I'm you. More specifically, a version of you, my name is Core!Sans 444724" The other Sans answered while the human was ready to fight but Core!Sans grabbed Sans by the arm, entered the hole and closed it, then Sans and Core!Sans were in a black place full of papers. Sans knew already that this paper was his Universe, he could feel it… but suddenly a Sans with black bones and "Error" signs everywhere on his body grabbed Sans's AU with blue strings, slowly turning it into code code that suddenly got erased by the same host of these strings.

"Hello, Classic 88269, I'm **Universal!Error!Sans**, but you can just call me Universal!Error" The entity said as he looked at Sans. "Anyways, I saw that your human was a cheater, so I simply erased your AU to make our Multiverse free of any cheaters or to remove other shitty things that shouldn't happen in a normal AU, such as a Sans escaping his AU" Universal!Error added, throwing blue strings to Sans but Core!Sans erased them with the **Delete Button**, Universal!Error then mysteriously teleported away.

Core!Sans and Sans were now in the Omega Timeline, a dimension above the Multiverse and exceeding it qualitatively in terms of dimensionality - a five-dimensional space to be more clear - where they met Core!Frisk, Murder!Sans 5517, Horror!Sans 812, Cross!Sans 4624, Dream!Sans 3319 and Seraphim!Sans 92441 but they couldn't even start a sentence that everything exploded and shook as Universal!Error appeared.

"I finally found this place" Universal!Error said.

"Good thing I followed you two" Universa!Error added, looking at both Core!Sans and Sans.

"Fresh poof!" Fresh!Sans said out loud as he appeared with a rainbow smoke, but Universal!Error shot Universal Glitch Blasters on him, which he dodged. Then, Last Breath and VHS appeared.

"Didn't I erase every Last Breath and VHS?" Universal!Error said as Last Breath shot a Gaster Blaster to him but he dodged it and then slammed Last Breath to a wall with his blue strings who grabbed him sneakily before the fight even started. Then, VHS shot a VHS Blaster but Universal!Error dodged it and the shot hit Swap!Papyrus 662428 which killed him. Then, Sudden Changes 6418 shot multiple bullets against Universal!Error with his gun but Universal!Error took it with his bare hands and then shot them back to the sender, but even faster. Sudden Changes barely missed, but then, one of Universal!Error's hand broke his skull and only his mouth and his body remained which fell on the ground.

VHS threw Sudden Changes's dead body to Universal!Error to use it as a shield in order to approach him and use a bone to hit him, but he got stabbed by a red bone before he could even see it, which opened his skull and turned into dust like Sudden Changes.

**Universal!Error was basically making a rampage across the Omega Timeline**

Universal!Error then started to transform the Omega Timeline into code, a lot of Heroes Sanses started to appear to stop him, but Universal!Error was simply too strong and, at one point, the Omega Timeline was fully a mass of code that Universal!Error started to erase. Core!Frisk and Core!Sans started to evacuate everyone until the Omega Timeline was now fully erased, erasing the people who didn't have time to run away. Core!Frisk and Core!Sans also got deleted, but Sans survived. Universal!Error then appeared to erase the "mistakes of the Multiverse" that survived.

"Look, an Undyne that survived the Genocide!" Universal!Error said out loud as he was erasing the code of everyone he saw, including the Undyne, but Sans could hide with other Sanses. Then, Universal!Error disappeared as he thought everyone had been erased. Everyone was trying to chill down.

"Soo, what's the name of y'all?" Sans asked. The Sanses answered, their names were Color 9154, DustTrust 6243, Killer 63995 and Horror 31995.

"Nice to meet you all, sooo uh, what should we do now?" Sans asked.

"Uh, join the Villain Sanses Squad?" Killer proposed.

"Nah, what about if we talk to Ink about what happened?" Color proposed instead.

"Who is Ink?" Sans asked as he looked at Color, surprised.

"The AUs protector" DustTrust answered.

"This looks like a great idea guys" Horror then added. Everyone went to the Doodlesphere, which basically is their Multiverse, where they met Ink!Sans who was fighting with Error!Sans. Color and Horror quickly attacked Error because they thought he was Universal!Error, after all, they almost look the same. Error then shot Glitch Blasters to Color, killing him before he could ever react.

“Uh” Horror said, frozen by the loss of his friend, but he didn't have time for this and teleported behind Sans.

“Dude, chill” Killer said to Error, then looked at Ink.

“Anyways, Ink do you know Universal!Error?” He asked.

“Yes, he's one of Error’s friends” Ink replied.

“HE ISN’T MY FRIEND DAMN!” Error shouted, annoyed by "the squid".

“Oh come on, you are like the same person!” Ink added.

“Ink, for the last time, just because people look like me doesn’t mean they are my friends!" Error replied out loud.

“Anyways, why are you asking?” Ink asked Killer.

“He destroyed the Omega Timeline…” Sans sadly answered.

“Oh, cool… wait… HE WHAT?!” Ink shouted.

“Oh come on he just did the work for me” Error said, definitely happy about the news.

“Whatever, we are here to ask help to Ink” Dusttrust said.

“I don’t th-think that he will be able to make a big-big difference” Error replied in a smirk, glitching a bit.

“If you guys want I can help too” Said a glitched skeleton behind Sans.

“I'm Fatal!Error, nice to meet you” The skeleton added.

“OH HELL NO!” Error shouted, ready to attack Fatal!Error

“what’s? wrong what’s?” Fatal!Error then replied to Error in a distorted and glitchy voice. Ink sighed and Error summoned a Glitch Blaster shooting it to Fatal!Error and Sans who dodged it, Fatal!Error then grabbed Error with his red strings.

“Chill out” Fatal!Error then said, holding Error tightly with his red strings. “We all have our own reasons to kill Universal!Error" He added.

“Fine… I'll help you” Error said reluctantly while Fatal!Error removed his strings.

“Good” Fatal!Error simply replied.

“Soooo, where do we find him?” Sans asked.

“Just say his name 3 times without stopping" Ink answered.

“Doesn’t this only work with ghosts?” Horror asked.

“Yeah, and also for him” Ink explained.

“Universal!Error, Universal!Error, Universal!Error” Error said, definitely not wanting to do this.

“Wait, that wasn’t the moment!” Ink shouted while Universal!Error appeared.

“Look, look, look… someone called me?” Universal!Error asked in a smirk, staring at the people who summoned him.

“Fuck” DustTrust, Fatal!Error, Killer and Horror said at the same time.

“Soooo what now?” Sans asked.

“We hope to not die” Ink said

“You- uh- IIIIIINK!!!” Error screamed, Universal!Error started to shoot Universal Glitch Blasters to everyone but they dodged.

“WHY DON’T YOU UNDERSTAND, JUST DIE!” Universal!Error shouted while Fatal!Error shot a Fatal Blaster to him but he teleported behind him and kicked his face. Error then used his strings to grab Universal!Error but he dodged, grabbing the strings and slamming Error onto the ground. Sans tried to shoot Gaster Blasters at him but he turned them into code and erased them.

“Listen, I erase AUs so that our Multiverse doesn't get erased by Multiversal!Error who erases Multiverses to not make our Omniverse - yeah I know, great jump - get erased by Omniversal!Error who doesn’t want to make our Omniverse get deleted by the King of the Sans-Verse” Universal!Error stated.

“What the actual fuck?” Fatal!Error asked.

“Oh! And remember to **never let your guard down in a fight**” Universal!Error said as Universal Bones broke Horror and Killer’s skull, and so Killer died. He then slammed Sans and Ink to the ground by altering the gravity and used Universal Strings to grab Fatal!Error and Error who started to turn into code before starting to get erased to which the others looked at in horror. DustTrust and Horror tried to stop him but they were too weak, suddenly Fatal!Error grabbed **a lot** of Human Souls from multiple AUs and merged with them, absorbing them, but he didn’t want to use all of that power, so he just gave his soul to Sans, who absorbed it one second before both Error and Fatal!Error got erased. Sans then summoned a Red Blaster and shot it at Universal!Error, who simply dodged it. Sans had now four mechanical arms, was one meter sixty-seven centimeters tall and his eyes had become black with white pupils. But he still wore a blue jacket, a white shirt, black pants and pink slippers.

“I think I'm the only Sans like this… call me Soul Keeper!Sans” Sans said, shooting a rainbow blaster so big that it could destroy the entire Doodlesphere.

“No, wait!” Dusttrust shouted in terror, grabbing SKSans’s arm but then a metallic arm cut off his head.

“What the hell?” Horror said, still alive, grabbing his axe from his skull but then another metallic arm shot a ray that obliterated his body.

“And now… Universal!Error, it’s your turn” SKSans said as he gazed at Universal!Error. He then grabbed Ink and threw him in the Rainbow Blaster's ray.

“No wait, you don’t understand!” Universal!Error shouted while the blaster obliterated the Doodlesphere, Ink and even Universal!Error, killing him for good. Then, SKSans exited the empty void that was the Doodlesphere before.

“I'm wondering what’s next” SKSans said