Error404 Sans is apart of AlphaTale and is the Ancestor of Error!Sans and is by SHADIKAL15.


Error404 used to work together with his brother, Alpha!Sans in their AU AlphaTale. In their AU, there were only two Sanses as they did not have a Papyrus. They both wore jackets with numbers so that the others could tell who is Alpha!Tale Sans and who is Error404. Alpha wore a jacket with a number 1 and Error404 wore a jacket with a number 2. Every day they helped those who needed help within their world.

But one day, an unidentified Sans entered their world and started killing many people. He was known as Mix!Sans, but was more well known as Infected. He came to seek more LV (Level of Violence). Infected waged a terrible battle wherein Error404 and Alpha had to stop him. They fought and fought until eventually, they came to an impasse. They got their breath back and before they could react, Infected killed Alpha!Sans. Error404 cried and mourned over his brother's death while looking at his dust. Infected smiled with pride and glee. Error404, boiling with rage and sadness, tore open a rift in reality with his bare hands but was immediately killed by Infected before he could do anything. Error404 lied on the ground looking at his brother's dust and then made a mistake that would haunt him until the end of his days. He decided to teleport him and Infected into the Anti-Void, a place that was uninhabitable at the time.

They both had arrived and Error404 immediately starting hacking the Anti-Void. This occurrence drove him insane in just a fraction of a second. Then once he stopped, he attempted to tear his face apart causing him to appear like he was crying this black ooze. He then grabbed some of the Anti-Void code and used it as wires to delete Infected. This was possible only because he hacked the Anti-Void. It gave him everlasting life and incredible durability. This gave Error404 just the right amount of power he needed to kill Infected.

He had won the battle, but at what cost? He had become a very evil monster and had gone insane. Error404 hid away in a special part of the Anti-Void that only he can access called the Main Frame/The outer wall. It is a place where he can see all activity in and out of the Anti-Void. He has been there ever since, never to be in contact with other AUs, slowly driving himself more and more insane with grief in his isolation.

How Error404 and Error met


Error404 is depressed and insane. As a puppet master and a true god he has a huge god complex. He is almost in constant grief though most would not be able to tell do to his outward charm and intelligent nature. He would much rather fight through controlling others rather than confront someone directly. He is cold and calculated and somewhat removed from what he does and doesn't feel much guilt anymore.


The link below will send you to the channel where Error404's Voice Actor is.




Anti-Void Magic

He has unlimited access to all forms of magic and other mystical and supernatural powers. It can bend, break and even create natural laws, distort the fabric of reality on a cosmic scale, perform incredible miracles and create things without limits.404 is also immune to all opposing magic and can even break through all external mystical defenses.

Power of the Cosmos

He can create, shape and manipulate cosmic energies to produce almost any desired effect, including molecular restructuring and transmutation of matter, manipulating matter in space and time, creating force fields, creating spatial portals and vortices, telekinesis and cosmic consciousness. He can cause comets, meteors, asteroids, stars, moons, planets, nebula, quasars and dark matter and anti-matter. They can generate stellar winds, solar flares, space storms and cause meteor showers.

Manipulation of Energy

404 is able to manage and manipulate any kind of energy, generate energy-blasts, create energy shields, impenetrable barriers and etc. He is also able to create new types of energies.

Manipulation of Reality

Allows 404 to manipulate, edit, shape and destroy reality itself at highest levels, completely ignoring logic and common sense.


404 is able to absorb various types of energy, negative effects imposed on him, someone else's strength, knowledge, memory. At 404, this ability will not have any effect, since its force cannot be absorbed, nullified, pulled out of it, taken away, etc.

Vibration manipulation

404 is able to generate and manipulate constant vibration oscillations that enable it to produce shock waves and earthquakes.

Blue Mastery

  • The most powerful version of the blue attack, able to move any object as if it had a soul, as well as manipulate both the mind and body.

Nigh Omniscience

404 has lived for many years, and he knows almost everything about his multiverse.

Dark Blasters

Powerful Blasters designed by The Astral Mother herself, able to completely destroy almost anything that it is fired at. Damage Rating is 100.

God Ray

Fires a blast from his fingers that will kill anything and anyone who has god like code or unordinary code from a regular Au character.

God Ray first shot

The First shot paralyzes the foe keeping them in a still and forever frozen position until the 2nd shot has landed.

God Ray 2nd shot

This final shot takes the time it has and kills the opponent once it's made contact.

Ultimate Adaptation

Error404 can quickly adapt to any situation, automatically gaining the necessary attributes to face them.In a fight, he may adapt themselves to resist abilities, replicate and enhance them to surpass their opponents, or spontaneously develop specific countermeasures. Can also analyze and understand any object, person or situation, quickly deducing the best course of action. 404 may develop Extrasensory Perception when searching for something, Teleportation when trying to reach a far away destination, become stronger when facing too many or powerful opponents, etc. 404 can quickly recover from any damage, develop immunities to their source, even rebuild themselves from scratch (or environmental materials/energies if fully destroyed), and are thus virtually indestructible.

Puppet Master Form/Error666

This form is activated when Error!Sans merges with Error404, and he will only do so when 404 is in need of major assistance. This Form is Highly Dangerous, possibly the only Form 404 can actually control. 404 in this form has full control of his and Error's abilities and even some new ones that combine the two. This new form isn't just strong though, This form Gives 404 ungodly Speed and incredible damage output to a whopping 190,990 dg per millisecond. And he moves at speeds faster than the speed of light...even as fast if not close to that of the Butterfly transformation's speed. This form also has an intense healing factor almost denying death itself to where it can heal just about any wound or form of damage it takes in battle.

Master Cables

These new form of Cables have been fused with 404's Powers and Error's, The Cabels start out red and blue chasing down the target and once latched onto something or someone Blue Master is then initiated with the color Blue and Red mixing together into Black forcing the Object or person into a forced state of binding. And the final kill is when the black cables crush the opponent into dust using Blue mastery as a type of heavy gravity crushing the opponent with sheer strength.

Puppet Master Form/Error666

Manipulations of the primary Anti-Void/Chaos

A kind of extra-dimensional manipulation that allows it to use the original Anti-Void (something that was when there was nothing yet). He can either send the target to the original Anti-Void or call the original Anti-Void to the ordinary world. In any case, objects that come into contact with it (except 404) immediately dissolve without a trace. Protection from the original Anti-Void does not exist in principle. He can also cause glitches, create viruses, summon crashes and interference with the energy of the original Anti-Void, which then pose a serious danger.


An extremely dangerous ability with which he can destroy a huge or even immeasurable amount of Alternative Universes. Also, all creatures affected by this ability completely lose their immortality, regeneration, invulnerability and adaptability, since it blocks all this. If you turn its effect against 404, then this does not hurt and will not affect him.


This Ability is used when Error404 is either killed or takes to much damage. When he has taken to much damage or is killed he will begin to scatter his code in the ground and will then delete himself from the world. After that, the particles Error404 left behind will gather code from the world and then return to Error404's lair and reanimate 404 from the resources they took.

Conceptual Management

Allows him to create, modify and destroy concepts, erase conceptual creatures from reality, manipulate the laws of physics and reality in general, create a variety of rules, conditions and restrictions, etc.

Code Immunity

This allows him to be protected from all types of code influences, code manipulations and code attacks. BUT, it also gives him full resistance to such types of attacks as magic, physical, energy, conceptual, psionic, mental, quantum and metaphysical attacks.

Meta Matter Control

Error404 can create, shape, manipulate, summon, destroy and customize all possible forms of matter, whether organic or inorganic, baryonic or non-baryonic, etc. This also extends to “exotic matter”, such as dark matter, antimatter, tachyons, and other highly theoretical forms of matter.

He can manipulate matter from alternate timelines, dimensions, universes, etc, using their immense power to pluck it from one of the aforementioned categories and materialize it to their location. Along with this, he can also create new types of matter and imbue them with properties of their choosing, creating matter not of the normal variety. For example, a 404 could create matter that grants powers to its wielder or matter that has properties or a structure that defies the established laws of physics.

At their strongest, he can manipulate quantum foam, the smallest level and foundation of reality as we currently know it.

Code Manipulation

This ability lets 404 manipulate code. He is able to create, edit and destroy anytime and anywhere.


The Butterfly transformation is the only transformation that 404 has no control over. This transformation is only attainable to 404 only, The Transformation is activated when 404 is close to death and the multiverse reacts to this as if it's death itself. The Multiverse than proceeds to direct all of its energy and code to its dying bit (404) and then that bit becomes the Multiverse itself for along as it is in danger. this major power boost allows 404 to destroy anything in his path and gives him full control of existence itself. This form is strong and godlike in every form and in almost every way. This form can Kill with just a mere touch and can fly using its wings at such high speeds that gives off the appearance of Teleportation. Its Dg output is so high that putting is here would take up the whole page so we'll just go with the fact that its instant death. Not only that, but the eyes on the wings shoot out high plasma lasers(these plasma lasers have unlimited superiority and power over Ultranova) more perfect and evolved forms of gaster beams so strong that they can go straight through Aus and other Galaxies with ease and still completely wipe them out.

There is one downside to this transformation, once it's finished defending itself the multiverse will take back All of it's code with it. Which means that once 404's fight is over, he will die instantly.

The form of BUTTERFLY is so potent and is so concentrated with code and pure energy that it's mere prescience of the user gives off waves of energy and code wherever 404 walks. The power of the



Multiverse takes a toll on the user however for

the longer they stay in

form the shorter they're

lifespan begins to decrease and the more stronger they get as the power settles in.


Allows him to manipulate, erase absolutely any kind and form of existence and nonexistence, he can erase anything and anyone, it also gives him the ability to technically very highest resistance, that is the highest form of complete invulnerability. This ability allows him to instantly erase even meta-abstract, extra-dimensional, high-dimensional and metaphysically existing objects or creatures. He able delete an eternity, removing targets from all lineages of time in every dimension, alter, reverse, or negate energy, etc. This could also lead to ultimate goal of "destroying matter," as in bringing it out of existence. It's also allowing him not only erase, but also change, manipulate and management absolutely anything/everything, either completely or partially, permanently or temporarily, from physical things like humans and objects to metaphysical things like concepts and logic, etc. This ability is available only in the form of a Butterfly.


Error404's mission is to tear apart worlds and use the stray code to rebuild AlphaTale from the ground up. He believes that the ends justify the means and that this is for the greater good. He fails to see anything wrong with sacrificing millions of worlds to accomplish this.


The Order is From the 1st/Best to the Last/Worse

Error404 has people he controls or they do his biding because of his power.

These will be labeled from Controlled to Main

Controlled = Under Error404's 24hour 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 Error404 says just like with the right side Henchmen, but unlike them, the Main Henchmen are Error404's 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.

You may add to this list if you wish to, but X-Gaster, Error!Sans and Negative must remain where they are.

  • Error - Main
  • Thought!Sans
  • Negative - Right Side
  • Cyan!Sans - Right Side
  • X-Gaster - Main
  • Nightmare - Right Side
  • Syno!Sans - Controlled


  • Geno says he once saw a weird looking skeleton walking around, but when he went to talk to it, it fled into the darkness.
  • Anonymous TDW went to check on his error counter part, but as he does, in the distances he sees a white hoodie sans who looks as if he were trying to free error!Anoumas. as soon as he got closer, Error404 was gone.
  • Even though it can't talk, the Sanstrosity has seen Error404 but didn't interact with him for fear that he may be attacked.
  • Ink!Sans has claimed and told Error!Sans that he saw a figure similar to him, but Error didn't listen and blew it off like Ink was trying to trick him.
  • Undertale Frisk once told Sans that they saw another him wandering around the woods and fields of Snowdin and Waterfall.
  • Rescuetale Gaster was taking pictures of wildlife when a white thing that resembled Sans came into view. Gaster was able to take a picture of the being before he vanished.
  • S.T being the Judge seeks to eliminate him but he has only seen him once.
  • What!Sans, and Tahw!Sans have seen him, during a fight they were having.
  • Hero Sans Thought He Saw A Suspicious, White Sans Walking around and gazing at him while he Was Fighting Dark!Sans
  • Metroidtale Undyne barely caught a glimpse of Error 404 and tried to attack him with a swiftness type of super, homing missile, but Error 404 escaped before the missile could get to him.
  • Negative!Sans told his brother once while he's exploring Horrortale, he found another him, but white. He didn't interact with him because he has a fear that it might attack him. He only see him once.
  • Awesomness sans once saw him when he killed dust.
  • Floweytale Flowey has once claimed to have seen a strange, glitchy Sans once, he tried to take its SOUL but he found the vine he used to do so ripped out from his stem, after that he fled back to his AU.
  • Inkmare once saw a Sans going around and assumed it was Error in cosplay, so he left it alone.
  • Beta! Toriel confused him for Crimson. The results weren't pretty.
  • Echo Flowey saw him wandering around the Neutral Timeline once, but he disappeared before he had time to tell anybody.
  • Killer saw some strange white sans while wandering around in horrortale, but when he tried to attack, it disappeared. he still lives to tell about it
  • VDash!Gadget at one point had to escape a collapsing Null Space Void which was caused by the appearance of a "White big boned looking Error Skeleton with a white and blue hooded robe, black shirt and shorts, and blue shoes."


  • Core Frisk once found Error404 Sans, but quickly left when they saw him gouging out his own eyes!
  • Error404 is a very rare AU to see, due to him being a recluse.
  • Error404 doesn't have a soul, having lost it long ago, though he still feels some positive emotion.
  • Error404 likes to watch and collect Ink!Sans's drawings, which is why Ink makes so many because whenever he makes a new drawing it magically disappears.
  • If Error were to for any reason touch Error404, he would end up bugging out the entire Multiverse.
  • If Error 404 were to get any stronger than he is now (for example absorb the 7 human souls) he would end up destroying the Multiverse.
  • Error404 is much stronger than Error!Sans by an incredible margin.
  • Error404 is the strongest member of the Error family.
  • Error404 is so strong that he can make another Error!Sans if he so wishes to.
  • Error404 is the brother of AlphaTale!Sans.
  • Error404 in a way is the technical father of Error!Sans.
  • Error404 loves to eat cookies.
  • Error404 is the god of Underverse.
  • Error404 alone can beat all the deities with little to no difficulty and he could probably take on half of the multiverse, though he prefers to only fight directly when necessary.
  • Error404 has been talking with 2 certain humans that have been giving him,some deadly information.
  • Error404 is strongest sans in the world.
  • Error404 have unlimited HP and DEF.
  • Error404 is the only Sans strong enough to control and make Error and any other Powerful Sans his puppet, Examples: Ultra!Sans, Omega Sans, Ink!Sans and ect.
  • Error404 isn't aware that his brother Alpha!Sans is alive.
  • Error404 and Error have a secret.
  • Error404 isn't really bad he just blinded by grief and wants to bring his brother back
  • When Error404 and Error are in a cramped space the room they are in will begin to lag, but when they are in a room that isn't so cramped and has enough space, the room will be normal again.
  • Error404 hates pranks, because they're childish and a waste of time.
  • Error404's birthday is on the 20th of December.
  • Error404 has the ability to take away an entire world and bring it into his realm. For example, imagine Jupiter where the moon is......Yea thats how big his realm is.
  • Error404's Realm is a giant cliff side that leads into the very core of the Multiverse and has a endless ceiling covered with Au's, Puppets, Ink's Drawings and many many Different types of Buttons.
  • Error404's mother is known as The Astral Mother.
  • The Only person besides Infected, who can beat Error404 would be his Mother The Astral Mother.
  • Error404 once freaked Abyss out by manipulating the code of the Abyss.
  • Unlike other battles, a battle with 404 would not turn everything black and white, but would somewhat turn everything into an abyss, there is no ground, and the physics in this dimension is kind of weird, this abyss has nothing, just what appears to be stars in the far distance. This means that you will only float and there's nowhere to hide, nowhere to escape.
  • Nicknamed as "The God of the Underverse" He is the one of the most powerful entities to exist in the vast multiverse.
  • His code is hidden where nobody but him can access. So if there were any hackers, he will not be affected.
  • Error404 Sans can collapse the Null Space void simply by stepping foot on it.
  • His theme is made by Jinify A.K.A. AbyssSans199 in the fandom wiki.
    Error404 Sans Theme - Jinify

    Error404 Sans Theme - Jinify


You may add any fanart that you make.

Credit to the original Artist.

New Piskel (1)
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