Undertale AU Wiki

Welcome to the Undertale AU Wiki, the main place for documenting Undertale's AUs. If you wish to contribute, just know that it is REQUIRED for you to read the Rules and Guidelines and the Policy of the Wiki BEFORE doing so.

As this is an AU Wiki, this wiki is NOT meant for characters. The Undertale OC Wiki exists for those. This Wiki is also not meant for AUs that do not have presence anywhere else, and those should be put on the Undertale AU Ideas Wiki.

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Undertale AU Wiki
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SansWink
*kid, listen. there are spoilers on this page; be careful when you're reading.

*you don't want a bad time, do ya?

To access just the story, click here.

X-Tale is an AU created by Jakei95 on Tumblr and Youtube. X-Tale is fractured into many parts: the comic, the animation series Underverse, and another comic named The Truce, which is the precursor to X-Tale.

X-Tale takes place in a post-pacifist timeline, where their Sans and Papyrus are part of the royal guard. However, certain incidents occur out of nowhere, such as Sans' thirst to kill Frisk.

Underverse supposedly takes place after X-Tale, Sans, now Cross, ends up going to each pacifist timeline within an AU and tries to take it himself, with help from Cross!Chara (X-Event!Chara) and Nightmare!Sans.

The Truce takes place before both series, in which Error!Sans and Ink!Sans both create a truce to better themselves.

X-Tale and Underverse both have a certain power called OVERWRITING. It allows the person to OVERWRITE certain objects within a timeline itself or the AU if the user has the full soul of OVERWRITE, such as changing stories, changing characters, and possibly destroying a timeline or an AU itself; examples include the Underswap AU, and possibly the X-Tale AU.

X-Tale

Summary

Years after X-Tale!Frisk shattered the barrier, X-Tale!Sans and X-Tale!Papyrus are both heading towards town hall, in which X-Tale!Undyne surprises the both out of nowhere and takes Frisk. This turned out to be a test, however Sans was acting much stranger than he ever was, especially when he tried to killed X-Tale!Frisk.

After the two are taken home by XGaster, he determines if he should overwrite or not. Meanwhile, Sans begins dreaming of X-Event!Chara, and he feels as if his soul was slowly being corrupted.

While at a ceremony to promote peace, Sans nearly kills X-Tale!Frisk had not XGaster intervened. He flees, only to be caught by X-Tale!Mettaton. Before he could explain to his brother, the time resets again, this time with the ceremony going on normally.

As it turns out, both X-Event!Frisk (under the influence of X-Event!Chara) and XGaster are both fighting against each other for control of the timeline, and that this timeline was rewritten 10 times thanks to the power of overwriting. Despite showing Sans the motivation to kill him, Sans' refusal leads to a battle which ends up getting Sans his signature scar, and the name "Cross".

XGaster resets the timeline, but Cross still has his scar from the battle earlier. As both him and Papyrus head out to town hall with X-Event!Frisk, X-Tale!Undyne tells Cross that he's no longer needed, and as he struggles against the battle that is going against him, XGaster is getting his treatment with everyone from X-Tale except Alphys. As he's dying, he reminds the X-Event that they'll never find his other half and that he'll always be watching them failing to get it in vain.

Realizing his refusal, X-Event!Frisk goes back to attack XGaster, but his plan is halted after Cross enters in, using blue magic on nearly everyone except Papyrus and eventually kill them and his brother. At the mean time, XGaster asks X-Tale!Alphys to store all of his entries, seeing that his death kills the universe. With the majority of the main cast dead, Cross proceeds to absorb the powers of the X-Event, which he does by taking the soul of X-Event. However, his status as a monster, and X-Tale!Frisk's death from him, meant the universe was dead on arrival and he is unable to overwrite at all. That is, until he came.

Underverse

Underverse 0.0

Underverse 0.0 was released as a comic from April 18, 2016 to May 2, 2016 with 5 parts each, and as an animation on July 5, 2016. The revamped version was uploaded on February 5, 2018.

Sans finds himself in a strange dimension with another person, and as they explain to him why they're here, Sans tries to kill them when they explain that they're him.

Their fake mercy, however, tricks Sans, and half of his soul is taken out of surprise. Ink!Sans does come up to stop Cross!Chara with his plan of taking that universe as his, but it wasn't enough to stop him from fleeing with his soul.

Underverse 0.1

Underverse 0.1 was released as a comic from May 7, 2016 to May 22, 2016, and as a animation from May 30, 2016 to June 30, 2016, with 6 parts each. The first three parts were released as an animation on July 5, 2016. The revamped version was uploaded on February 19, 2018.

With half of Sans' soul, Cross!Chara asks Cross if he's ready, to which he questions why he feels this way. Cross!Chara asks him if he's afraid of releasing him. Cross is finally motivated to absorb the soul, and gains 0.5 out of it.

Sans asks what was with Cross to Ink, and he explains to him that he felt the presence of a new AU, which barely anyone but Cross and Cross!Chara, from a genocide run. Ink's constant visiting helped Cross gain control of both souls, but when Error came along, both him and Cross!Chara fought for control yet again, and decided to visit Sans' universe so that they could stay there.

Sans isn't worried that he has only half a soul, and Ink left him alone. However, during a volleyball game at his picnic, his side effects begins to show, and just when he decided to take a break, Frisk asked him who Ink was.

Meanwhile, Cross!Chara tells Cross that he should go through the AUs and collect their data there, and when Cross' negative feels began to show, Nightmare!Sans showed up and the both of them made a deal, as long as Cross doesn't harm somebody physically.

Dream!Sans finds out about the deal, and alerts Ink about it, which Ink takes advantage to find Cross more easily. Sans explains to Frisk about the issues that is haunting him right now, and he tells them to cover for him while he's gone with Ink to find his other soul.

Nightmare takes Cross to his first AU, Underfell, where a pacifist timeline is occurring.

Underverse 0.2

Underverse 0.2 was released as two separate parts, Part 1 on August 22, 2016, and Part 2 on October 18, 2016. The revamped version was uploaded on March 13, 2018.

After landing in the Underfell AU, Ink and Sans begin their search for Cross, thanks to a buildup of red marks.

As Cross continues marking the snow with his blade, Underfell!Sans intervenes, and despite Cross telling him that his world is his now, he refuses to accept Cross' deal and battles him out. Even though Underfell!Sans had the advantage, he was ultimately defeated by Cross.

When Ink and Sans arrive at the scene, Cross immediately stabs Underfell!Sans in order to control him for the battle against them. However, the two were able to get Underfell!Sans tied up as Sans talks with Cross over XGaster, which shocks Cross by surprise. He soon uses his special attack on Cross: his slipper; which gave enough time for Underfell!Sans to free himself from Cross' control and before he's able to kill him, he flees.

As Underfell!Sans realizes the damage Cross has done, Ink is captured by Error, and after Sans teleports out of there for a break, Underfell!Sans decides to join after a rude calling with Underfell!Papyrus.

Underverse Xtra Scene

An Xtra Scene was released on November 24, 2016 (revamped version on April 28, 2018) to fill the gaps of Underverse 0.2 and 0.3. Core!Frisk gives Sans some advice to defeat Cross, as Fell!Sans joins him to the site.

Error isn't pleased over this whole X-Event, and tells him that if he was involved, there would be plenty of fun coming on from his side. After Ink leaves his place, Dream reminds Ink that he'll spy on Cross and Nightmare and give Ink crucial information on where Cross is going next.

Underverse 0.3 Part 1 & 2

Underverse 0.3 is, like Underverse 0.2 (originally), divided into two parts; Part 1 was released on March 26, 2017, and Part 2 was released on August 6, 2017. Part 1's revamped version was uploaded on May 22, 2018.

Furious over Cross' failure in Underfell, Cross!Chara attempts to take over, but he's knocked out before he could. Nightmare scolds Cross of what he's doing, but after Cross tells him his ambitions, he calms down, and takes Cross to Underswap.

Underswap!Papyrus mistakes him for his brother at first, and shows his new visitor to everyone, but considering that the code reminded too much of his, he goes ahead with Nightmare's plan. Fortunately, Sans and Fell!Sans were able to distract Cross before he could do much to Underswap, but the huge victory ends up being a flop, as Cross!Chara is revived by the soul of Underswap!Chara.

X-Event!Chara throws Sans and Fell!Sans out to the X-Tale universe, and Nightmare ties Ink up before X-Event!Chara begins his X-Event on the Underswap universe. He then performs a series of events on the Underswap crew thanks to the power of overwriting. He even fights Ink over a white vial, which contains the other half of XGaster's soul. Nightmare, at first, doesn't appreciate this, but over time, he felt confident that X-Event!Chara was much more understanding than Cross, and allowed him to kill someone.

Meanwhile, Sans and Fell!Sans tries to hide from the now captured Underswap characters, and Dream tells them that they should lower their negative feelings, as his brother feeds on it. After Underswap!Papyrus tells his brother that this was the best timeline they could ever live in, the three were able to enter, and Sans was able to stop X-Event!Chara thanks to his ketchup bottle.

X-Event!Chara soon tries to reason with Sans about his own timeline, and his purpose, but with the failure of his chance at killing, Nightmare kills Underswap!Chara, and leaves with X-Event!Chara, telling Sans to "spend his last moments". Dream tells them all to head to Outertale, another safe pacifist AU, but Underswap!Papyrus decides to stay in the AU, since he has no chance at trusting Ink after the incident that has occurred. And as the crew heads to Outertale, Underswap!Papyrus looks up to the sunset, as the timeline is erased.

Underverse Xtra Scene 2

Another Xtra Scene that is meant to be a stopgap between Underverse 0.3 and 0.4 was released on December 14, 2017.

As Error enjoys himself in his world, taking a break from finding the Omega Timeline, he's greeted by Ink, who tells his plans of getting rid of him, before the two start watching Undernovela. As they watch though, Error notices that the Cross anomalies were in the show, and after Asgoro and Sin enter in to stop Cross and Cross!Chara, Ink champs in, using his vial to erase Asgoro and Sin. He thanks Error for joining his game, where XGaster tells him to wake up, proclaiming that this game is getting interesting.

It turned out to be a bad dream, but realizing that Cross's soul was flicking, Error heads to the Doodle Sphere, and proceeds to tie up every single AU. He enters X-Tale once more, and he's surprised to see Fresh, telling him to leave or he'll give his radical hug on him. As Error looks behind Fresh, he noticed the Underswap characters as well as Underfell's Snowdin, all glitched up. With this discovery, he officially breaks the truce he made with Ink.

The Truce

Summary

While arguing over the multiverse, Error and Ink are both taken to a mysterious place where they can't use their attack anymore. As the two of them panic over what to do, they're both taken into their own world by a mysterious voice, who tells them that the war is over.

After returning, the two finally decide to be "friends", which allowed them to leave. They both decided on a truce: If Ink promises not to make any more AUs, Error will not delete the others.. Despite this, Error remained hostile towards Ink.

Later, Ink finds out that another AU was deleting itself and comes to save it. It turns out to be a monochromatic world called X-Tale, with the only inhabitants being X-Tale!Frisk, X-Tale!Chara, and XGaster. After showing XGaster the multiverse, he's convinced to create his own game using him and his children.

This comic's information is outdated and can no longer be found in Jakei's blog. However, a short animation was made regarding the truce topic.

Trivia

  • Most of X-Tale is monochromatic, with some shades of yellow, purple, and red.
  • The Frisk and Chara from this AU are boys and brothers.
  • As explained here, the reason why Underverse’s aspect ratio is 3:2 is because the series started as a gif animated comic. Due to Jael's strategy to help protect her videos from being stolen, she kept the resolution, adding watermarks on those blank spaces.
  • The Underverse comment section is sometimes disabled, due to Jakei's feelings over the comment's content (e.g. asking for their AU to show up in the series)
    • It's likely due to the audience of younger kids on YouTube, who don't understand what AUs are being included in Underverse, and are likely to request their own.
  • Sometime in January 2018, Jakei allowed many AU creators to have their AUs featured in her videos. The flood of requests for their AU character designs showed how much an audience she had, and had to narrow down her deadline to a few days later.
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