The Metallic Replacement

## Disclaimer

The Characters that are from different verses such as Fatal404 and N!KM aren't 100% their canon version, and their power levels may not be the same.

## The Story

Abyss and Mecha were working on a machine that would bring 404 down, with the help of Bill they got the Mainframe code and they added it to the machine. The machine was based on 404's shape and clothes. It wore a blue jacket and a gray T-Shirt, it had black pants with black slippers, and its whole body was gray as it was made out of metal. It had no mouth and had a blue visor, after the creation of the machine they named it **Mecha404**. They started testing Mecha404, they teleported him to the other part of the Multiverse. Then, Mecha404 started to run on a non-existing surface and got to the other edge of the Multiverse in 0 time. After this, they ordered Mecha404 to scan all of the Multiverse

[Space-Time: Existant, Spatio-Temporal Dimensionality: Aleph-0, Spatial: Aleph-0, Temporal: Aleph-0, Universe Type: Mini-Multiverse, The Source: Outerwall/Mainframe, Disasters that occurs usually: Universe Merge] Mecha404 said.

Abyss looked confused "I thought the Multiverse was 12-Dimensional," Abyss said.

"Mecha404 has Mainframe code so his statements about it should be more accurate," said Mecha.

Then, they continued testing it "I want you to take a *piece* from the Multiverse itself," said Mecha.

[This would be impossible due to the nature of the Multiverse] said Mecha404.

"We still want you to do it anyways," said Abyss. Then Mecha404 raised his arm at 90 degrees and ripped a piece of the Multiverse itself.

"But you said it was impossible!" shouted Abyss.

[It's impossible] said Mecha404 again. Then suddenly, an energy wave shooked the whole Reality as the Mainframe pool has been absorbed by 404, this change in the Mainframe affected Mecha404, and his program got erased. With this, he got free will and some traits of 404. After this he immediately rushed to the HQ, he saw Error looking around for 404, then Error noticed him.

"Sir, is that you?" asked Error.

"I'm not truly Willaim himself, I'm not even from Alphatale," Said Mecha404. After this Error summoned blasters which Mecha404 erased.

"So, we are doing this the hard way," said Mecha404 and started to change the memories of Error and make it so as if Mecha404 was there from the very start.

Mecha404 repaired the HQ as it was damaged because of the massive energy wave caused by the Mainframe.

"Error can you find the guy who calls himself Jack or Virus404 and when you find it calls me immediately," said Mecha404.

"Okay sir," said Error before teleporting away. Mecha404 then started to go through the time itself to see the actions of 404. Then, he found the fight between 404 and Jack. He saw 404 transforming into a form that he called Butterfly after seeing it. Mecha404 tried to transform into a form like 404 but failed because of not having enough Mainframe code as 404 draws power from the Mainframe and can't transform on his own. Mecha404 realizing this started to scan the whole Reality itself to search for Mainframe users and found plenty of them. Then with his full speed, he went to another Infinisphere in 0 time. The entity was glowing white. It had one floating eye, with nobody and triangles floating around the eye.

"All of creation and magic, all is below The Source," said the entity with a booming voice which Mecha404 ignored.

"Let's get this over with," said Mecha404. The Source continued to say the same thing while shooting rays that cut through the Infinisphere immediately but Mecha404 dodged them, went behind The Source, and kicked it sending it to another Multiverse. Then Mecha404 blitzed it and stole its Mainframe code even before The Source realize it. Then Mecha404 punched The Source and shattered it into infinite pieces and with the force of the punch all of these infinite pieces were sent across space-time. Then Mecha404 went to the HQ, he again started to search in the Reality itself to find a Mainframe user. Then he found the location of another one and he rushed to that Infinisphere. It was a black humanoid entity with 4 arms and a blue dot-like symbol on its chest. Its head was flaming, it wore blue pants and was immobile. Then he landed on the non-existing floor. "A visitor? Indeed, I have slept long enough" said the entity with a strong voice and then blitzed Mecha404 only to be sent flying by him. Then Mecha404 started shooting rays from his 5 fingers at once which cut through the Infinisphere, which the entity dodged "You can't win, the chances of you winning are equal to 0%. I've seen everything, and all the fate itself, it cannot be changed!" shouted the entity. Then Mecha404 punched the entity sending it flying again. Then, he summoned a blade and cut the entity in half.

"B-but, the probability of you winning was 0," said the entity. Mecha404 didn't answer and absorbed the Mainframe code. He then crushed the entity's head and left.

Mecha404 when he arrived at the HQ felt a feeling: he felt worried about Error. He left the HQ to look for him, searched all of the Infinisphere, and found him. He didn't let his presence get noticed by him and watched him. He was still searching. After this, he attached a nano-camera to Error to watch if anything goes wrong.

Then he left the Multiverse that Error was in, went to the HQ, and watched him a little. Mecha404 then literally searched in the whole Reality, not a finite or infinite portion of it but every part of it. He only found one which seemed to be inside the Multiverse but in the depths of it. Mecha404 went there in 0 time. It was all black and blue. It was like the inside of an Universe but then he saw the figure standing there with a twisted blue smile, blue eye sockets with one having a white pupil, a long black coat, and a black cloth inside it. His pants were also black, he also had a blue fluff.

"I already know why you are here," said the entity.

"You are here for the Mainframe code I possess, but I don't think that you can defeat the demon itself," said the entity. "My name is Osiris, the demon of the Multiverse," he said.

"So you are weak like 404," said Mecha404, which seemingly angered Osiris.

"HOW DARE YOU COMPARE ME TO THAT WANNABE GOD?!" Shouted Osiris who started to fire Anti-God Rays which shred through the armor of Mecha404. Mecha404 then started to dodge them and fired rays from his fingers.

"Hmm, typical edgy **Sans,**" said Mecha404. With these words, Osiris's simple emotions started to shake the Infinisphere and destroy its properties.

"HOW DARE YOU TO... HOW... COMPARE ME TO THOSE PIECES OF BONES HOW... I'M ENDING THIS HERE AND NOW!" with this the whole Reality started to shake and Osiris transformed into Deltarune.

"ENOUGH PLAYING GAMES!" Deltarune started to control all of the space-time inside Reality, crushing Mecha404 into singularity. However a sudden energy rise happened, singularity disappeared and Mecha404 was standing with an incomplete version of his Butterfly form which he called NEO. As NEO and Deltarune battled the whole reality and everything in it start to get destroyed with their every punch, every move of reality gets more unstable then NEO snapped the neck of Deltarune and when he tried to regen he stole all of the Mainframe code from him which resulted of Osiris dying as he wasn't able to continue his existence without Mainframe code. NEO then became complete and restored all of Reality. Then, he transformed back to his base and left.

He had nothing to do as he was not trying to resurrect alphatale like 404, so he started to visit other Multiverses and collect them. Mecha404 went to a Multiverse.

"Your God cannot save you," said Fatal404. Then a beam of blue light emerged from the skies. Fatal404 looked confused as the other inhabitants of the Multiverse ran.

"Who are you supposed to be?" asked Fatal404.

"A Savior," said Mecha404.

"We will see that" and he summoned his monochromatic tentacles creating an infinite Multiverse and infinite Universes for each scenario. Mecha404 breaks out easily and starts firing Mainframe rockets at Fatal404 which he dodges. These rockets create huge holes in the Multiverse. Fatal404 seems surprised and used his blue strings to mind control and capture Mecha404 which seemed to didn't work. Then, Mecha404 liquefied the strings. Fatal404 went behind him and used his red strings which got erased from existence permanently and when Fatal404 tried to use them again it didn't work as he wasn't able to summon them. With anger, Fatal404 summoned 100 Fatal-Paradox Blasters firing massive amounts of anti-matter at Mecha404 which he tanked but it seemed to damage his Outer-Armor. Then Mecha404 repaired it with his nano-tech. Then he created cables with his nano-tech, grabbed Fatal404, and slammed him to the ground. Fatal404 then used his Ultima Rays which heavily damaged Mecha404.

"So that hurts him," Fatal404 thought to himself and then punched Mecha404 sending him flying, Mecha404 repaired, then Fatal404's strength started to increase and he summoned his Omega Saber stabbing Mecha404 with them. Mecha404 was heavily injured but then he made an explosion sending Fatal404 flying. Then he repaired himself and walked over Fatal404 but then another one appeared from behind opening his rib cage which was charging a large amount of energy in a sphere and then fired it deleting his body, mind, history, memories, and everything that allowed him to function.

"He fell like the rest of them," said Fatal404 but then, Mecha404's body regenerated

"You thought it would be that easy?" asked Mecha404 and then blitzed Fatal404 before punching him into the ground, crushing his face. He then completely ignored him unbound by death itself, killed him, and left the Multiverse.

"This multiverse would be a good addition to my collection," said Mecha404 before shrinking and grabbing it. Mecha404 then added it to his collection. It looked like a solar system where Mecha404's Multiverse is the star and the others are planets. Fatal404 regenerated afterward of the battle.

"What was that.." He thought.

Mecha404 then went to another Multiverse, he saw a Gaster and an Ink fighting an Error.

"This Multiverse seems to be inferior dimensionality-wise. It's only 5-Dimensional while most of the Universes are 11-D" thought Mecha404 and then interfered with the battle.

"What is that supposed to be? Finish him" said X-Gaster to Ink. Then Ink dashed at Mecha404 and tried to slash him with his brush but after it collided with Mecha404 it shattered into infinite infinitesimal pieces. Then Mecha404 punched Ink crushing all of his bones and then looked at Error. He slowly approached him, this was somehow enough to scare Error away.

"Very interesting, an entity with such power," said X-Gaster.

"However, it will be overwritten as such entities can't exist in my perfect Multiverse," said X-Gaster again and pressed OverWrite but it didn't work. *Error: You don't have permission to overwrite the entity*

"How..." said X-Gaster.

"You always want perfection but you never looked at yourself. You are the imperfection of this Multiverse" said Mecha404 and erased X-Gaster from existence permanently. Then Mecha404 destroyed the Multiverse and went to another one. He was in a palace and he wandered around. He then reached the throne room. He saw an Asgore sitting on the throne.

"State your reason to be here," said the Asgore.

"Traveling Multiverses to add them to my collection," said Mecha404 knowing he would get into a fight.

"I need to eliminate this threat even before he does something," KM thought to himself. He then summoned chains which Mecha404 cut with his swords immediately and KM dashed at Mecha404 with his axe. Mecha404 and KM clashed, Mecha404 wielding Infini-Blades and KM wielding the Axe of Destiny. Then Mecha404 jumped back and fired Mainframe rockets which destroyed the palace and damaged KM. Then KM started to shoot yellow beams which damaged the Outer-Armor of Mecha404. Then Mecha404 went behind KM and sent him flying. KM landed on the ground using his purple flames to melt Mecha404 which didn't work and Mecha404 fired a laser from his visor which got through the armor of KM, heavily damaging him. Then time stopped as KM started to charge huge amounts of energy before firing it, destroying the Multiverse and himself.

"This Multiverse was nice but anyways".

He continued collecting Multiverses like this which made some AUs in those Multiverses angry. Clonetale, Gammatale, Underhell, and Tales of the Heaven made an alliance to create an entity to stop Mecha404. They started by creating the vessel of the entity. It would be called The End. They made the vessel with the most durable organic material they could find. The vessel was black with red outlines, his inside wear had red Xs on it and his head was made out of fire-like things. After its creation, they injected the Cosmic Essence from the Transvoid exploration they made. The End woke up with full red eyes.

"HAHAHHHAAHHAHAHA" The End started to laugh. The very fabric of reality and space-time start to rip apart, but there was no indication of The End doing them. Planets and stars shattered with every quark of them being spread across space-time which is now destroyed. The Multiverse they resided in was destroyed. An emotion spread across the Infinisphere: *fear.* Every entity, living, non-living, emotional, emotionless... every single one of them felt fear, the Cosmic Essence, in The End, transformed into something twisted, something scary and evil. It became Fear Essence. Mecha404 also felt fear

"But, I deleted fear from my system, so how..." thought Mecha404 and went to the source of energy.He found The End waiting him here

"They created me to finish you off... let's see if you are worthy of that" The End said with a deep voice and blitzed Mecha404 easily breaking his Outer-Armor and his Inner Armor. Then Mecha404 jumped back and fired Mainframe rockets, but The End completely ignored the destruction of these rockets, Mecha404 then tried to fire his God-Rays from his fingers which had no effect on him.

"You cant defeat me, rip-off404" then The End summoned hellfires which hurted Mecha404 so much that all of his body start to melt. As a last resort, he used the soul of an Error which he got from an another Multiverse, transforming into Mecha666. His grey metal became darker and his clothes changed colors except for his cloak and pants. His T-Shirt was red and his visor was yellow. He dashed at The End and used the abilities he has copied from his opponents from his other fights to defeat him. He summoned monochrome cables from his back and tried to trap The End in his own mind but The End prevented him from doing it and punched him, sending Mecha666 outside of the Infinisphere. Then Mecha666 fired a ray from his visor which destroyed the Infinisphere. The End survived and snapped his neck which regenerated in 0 time. Then Mecha666 charged a thunderbolt-like weapon and fired it at The End which he dodged easily.The End then summoned chains from Hell and grabbed Mecha666 with them pulling him into there. But he somehow broke out. Then Mecha666 opened his rib cage and fired a beam which deleted The End's history, mind, body and every aspect of him that allowed it to function. The End regenerated

"Heh, did you really think it would be that easy?" said The End. With this words Mecha666 remembered the fight between him and Fatal404. Then The End summoned big hands and slapped Mecha666 with them.

"I need to use the NEO transformation" he thought to himself. Then he transformed back to his base state and next transformed into Mecha404: NEO. The End arrived and kicked NEO. Then the Reality and space-time started completely to fall apart. NEO looked at The End

"I'm very good at creating disasters what could I say?" said End. Then each space-time continum and all of space-time got destroyed alongside with the Reality. NEO then fired rays from his wings which could delete every aspect of someone that allows them to function. But The End seemed to be not be affected. The End and NEO fought and the fight continued in the Transvoid, destroying planets. NEO then used nano-tech to create a cannon which would be able to destroy The End and fired it at him. But he survived. Then The End broke the visor of NEO and cracked his head. He then destroyed an Universe inside the Transvoid.

"How... I calculated all of the possibilities that exist, in-exist, would exist and existed... how do you even win?" asked NEO. The End just looked at him. Then NEO saw a light blue light.

"A Transvoid entity" he thought to himself and with his fullspeed he exited the Transvoid. Then Islothorn came. "What are you doing in my domain?" Asked with a threatenig tone and with a booming voice Islothorn. The End started to laugh.

"HAHAHAHA" The End laughed and then dashed at Islothorn to kill him however Islothron erased all of his aspects, all of them, every single one of his aspects from existence and non-existence itself. He then left after The End regenerated.

"I̵̢̛̛̝͉̘͍̦̣̣̦͇̼͔͌͗̄͗̀̽͋̇̇͘͜͝ͅ ̷̨̉͘Ā̶̺̞̠̥̪̥̪͔̮ͅL̷̢̳̹̱̎̒̆̎͋͛̓̈̓̿̓͋ͅW̷̢̡̦̩̞̳̪̑̈́Ä̷̤́̽̀̓̓̆Ý̶̧̡̺̠͈͕̝́̌̊̈͗͗̾̌̕S̵͉̲͖͓͈̈́͐́͂̅̄̿́̑͘̕͝ ̴͔̣̰̮̞̺͓̻͖̞̩̂̀̍̀͝C̸̨̳͎͖̭͛͊̈́͛̂͠Ò̴̜͠M̸̡̢̨̹͇͙̺̳͈̭̠͖̣̖͗̊̊͛́̋̊̊̇́̽͗E̴̛̬͔̠͆͐͐́͛͋͑͐ ̶̨̡͍̘̣́̊̈̀̿͂͊̐̓̏́̚B̷̡̛̘̏̄̌͆̌̉̾̆̌͘̕A̸̧̖̗̥̮͔̩̹̣̘͇͂̍͑͒̈́͜C̸̠̮̈̀́̑͑̚̕K̷̙̓̕".