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* Golly, this sure is terrible

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Legendtale was far from being perfect or even a complete and strong AU until Laster discovered how code works and affects their life so he decided to make use of it and created the reset button but he found out that it needs determination to use it so he asked the most determined one he knew Legend Chara aka Lara and when she used it to stop the 2nd war she found herself in a white place looking at a glitchy skeleton who was created due to her determination and the reset before she returned home but he didn't understand where he was or even what he was and years passed till Laster found him while exploring the anti-void and taught him everything and when he knew how strong and glitchy he was he decided to call him as Reality ERROR.

Reality ERROR worked for him till he decided to visit Legendtale as he wasn't allowed to go out from the anti-void and when he did it was seconds till the world started to die and got destroyed Laster wasn't really sad about anything he was just angry because he disobeyed him so while shouting at Reality ERROR he got angry and attacked him, but didn't kill Laster and decided that the roles must be reversed.



He is unstable, very intelligent and often enjoys killing others but feels warmth and hatred towards laster as he is considered his father and creator and moreover he's a trickster that can trick all people to think he's someone he really isn't but wants to live in an AU but almost every AU he enters gets destroyed over time even when he learnt how to control himself as a result he likes to visit the original Undertale as it is one of the few that doesn't get destroyed.


A short skeleton whose left eye is cracked which is so black that you can see the void and his right eye is green with the word error in its middle with black red lines on his face and grey teeth and his arm is a little sharper with unknown error written on its back on the left one and error written on the front of his right arm this part is black shining red despite being a white skeleton wearing a black coat with red lines created by laster covering his whole body most of the time so that it prevents or at least reduces the chances of destroying the AU he's in and his white shirt with an injury like code with 010111 and white short with Grey lines


An unknown error has occurred. Reality has shut down...

01001000 01100101 00100000 01110111 01100001 01101110 01110100 01110011 00100000 01110100 01101111 00100000 01101011 01101001 01101100 01101100 00100000 01100001 01101100 01101100 00100000 01110100 01101000 01100101 00100000 01100111 01101100 01101001 01110100 01100011 01101000 01110011 00101100 01100101 01110010 01110010 01101111 01110010 01110011 00100000 01100001 01101110 01100100 00100000 01110110 01101001 01110010 01110101 01110011 01100101 01110011 00100000 01100001 01101110 01100100 00100000 01010100 01101111 00100000 01100011 01101111 01101110 01110100 01110010 01101111 01101100 00100000 01110100 01101000 01100101 00100000 01100001 01101110 01110100 01101001 01110110 01101111 01101001 01100100 00100000 01100001 01101110 01100100 00100000 01110100 01101000 01100101 01101110 00100000 01100011 01110010 01100101 01100001 01110100 01100101 00100000 01100001 00100000 01101110 01100101 01110111 00100000 01110111 01101111 01110010 01101100 01100100 00100000 01110100 01101000 01100001 01110100 00100000 01101000 01100101 00100000 01100011 01100001 01101110 00100000 01101100 01101001 01110110 01100101 00100000 01101001 01101110 00100000 


Reality Error has people he controls or they do his bidding because of his power.

These will be labeled from Controlled to Main

Controlled = Under his and Oscuro's 24-hour Watch and never set free unless he says so.

Right Side = They have Free will, but they must do as he says and come to his side when he says so.

Main = These few Henchmen have their free will but still do what Reality Error says just like with the right side Henchmen, but unlike them, the Main Henchmen are his closest allies, so they can also help him make tough decisions and the main henchmen often can command the Right Side and The Controlled Henchmen to do their bidding.

legend Undyne - main

Legend Asriel - controlled

Legend Sans - right side

Legend Frisk - right side


Ultra-Reality Blasters

These gaster blasters can shoot a destructive beam that can obliterate almost anything or anyone. With enough concentration and power, they can also destroy AUs. However, this requires time, peace, and quiet for about five hours. The blasters can't kill Error 404, Bill Sans, King Multiverse, or any supreme god.

Demonic Cables

Unbreakable cables that will make opponents feel their sins and regrets if caught in them. Those affected will experience never ending nightmares and unspeakable horrors. This ability cannot work on people with true goodness like Dream Sans.

Vector Control

Reality Error can control the vector of anything. Some common vectors he usually controls are energy, heat, light, sound and beams from any gaster blasters in his line of sight.

The Sun

He could create a giant sphere of the same shape and heat as the sun, but smaller in size than the sun. The Sun's temperature will not affect surrounding objects or people. Anyone hit by The Sun will take 999999 damage every ten seconds for half an hour.


Reality Error can generate orange electricity much similar to the lightning on Jupiter. However, it is much more powerful. When someone touches the electricity, they will experience the feeling of being in planck temperature, the highest possible temperature known in reality. For those who don't know, planck tempurature has the value 1.416 785 (71) × 10 32 kelvin, or about 2.55 × 10 32 fahrenheit.

Soul Magic

Like every Sans, Reality Error can control souls and turn them blue. He can also change them into orange, yellow etc.

Timeline Shatter

When Reality Error enters an AU, it will get gradually destroyed from glitches that appear everywhere. It usually takes a couple seconds for the AU to be completely destroyed. When he learned to control his glitches, it took two weeks for the AU to be destroyed. With the coat, it takes five weeks.

Dark Matter

He can manipulate Dark matter, the only matter that exist in the laws of physic. He can create, reshape and transform into Dark matter and he is also able to transform Dark matter into energy which allow him to control 25,000 types of energy.

Imagination Breaker

Reality Error is completely immune to any Error or Fusion. He can also cancel any forms his opponents have without any exception. He is immune to mind control. If someone attempts to control his mind, he can reverse the effect. this is powerful enough to even be used on King multiverse Sans.

Code Manipulation

Reality Error can see though codes and control them with absolute ease. Nothing and no one can defeat him in a code related power.

Reality Blood

A liquid that Laster discovered while working on the reset button. However, it can only be acquired from reality error himself after the incident of Legendtale.

The blood makes those affected by it immortal, and they will never die as long as Reality Error is still alive. Those affected by the blood will be gifted with new random powers. However, it also contains a curse that is permanent. It cannot be undone even if Reality Error himself wishes to remove it.

Disconnection Form

Reality Error assumes this form when he feels like getting serious. This form grants him the power of the black box (every known code). He is able to change reality, control codes, and even has the capability to control errors or anything related to himself. He is immune to all forms of damage except for viruses when in this form.

(Could not find any photos of him in this form. If anyone can find a photo, please put it here. It would be much appreciated!)


His only weakness is virus attacks. Viruses can leave him vulnerable for a time, but the it has a 50% chance to affect him. Nothing else can cause real damage to him. For an example, Virus404!Sans would be at a huge advantage if it ever came down to a battle (Check out Virus404!Sans if you haven't already).



Their relationship is very complicated that reality error feels so sorry about him but that doesn't mean they are total friends you can say oscuro is more like his co-worker but the brain of their plan as he was the one that told him how to go into the AUs without destroying them even if it means killing many many people.

legend Chara

The most important and dangerous enemy to Reality Error. She will never give up, and never forget what he and Dark did to her AU and family.


She is the first person Reality Error met. Seba has feelings for Reality Error, but he does not know this. 


  • his coat was made by Laster to reduce the chances of destroying AUs
  • Reality Error desperately wanted to live in an AU, so he visited the original Undertale too many times
  • Reality Error sees Laster as a father and traitor all in one
  • Legend Chara is an enemy of Reality Error
  • As long as Reality Error is alive, none of the AUs he destroyed will be ressurected like Legendtale
  • Reality Error cannot be killed as long as the Anti-Void (the Black Box) exists
  • If the Anti-Void got destroyed (somehow while Reality Error is in), he will have the power of the Anti-Void.
  • Reality Error found a place to stay in which was the black box and when he entered the place became so dangerous that anyone but him will die instantly
  • Reality Error will speak in Swedish when he is excited
  • Reality Error hates being reminded that he's short
  • Reality Error loves chocolate (Like Chara)
  • Reality Error doesn't feel anything
  • Reality Error hates Legendtale
  • Reality Error speaks in Wingdings(Like W.D. Gaster) when he is angry
  • Reality Error speaks to Oscuro in computer language
  • Reality Error can't be erased or hacked by any means
  • when Reality Error enters an AU the reset button disappears
  • Reality Error often speaks to the files
  • Reality Error sees code just like fatel error despite him being a blind he only depends on code to see and for those without code he sees their effect on code
  • The only one that can kill reality error without destroying the Anti-Void is Legend Chara
  • Reality Error really wants to live in an AU,but he can't so he wants to create a world that can endure his existence.
  • Reality Error hides in the black box so that if anyone got into it will be killed unless reality error or Seba want to.