XTale / Underverse masterpost
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This project started with a short animation created by Jael Peñaloza (Also known as JakeiNimation or Jakei95).
The story takes place in a “post-pacifist” timeline in the original universe of Undertale, where half of Sans’ soul is stolen by a corrupted alternate version of himself known as Cross.
With the help of Ink -the guardian of the AUs- Sans will travel through the Alternate Universes to recover his soul while he discovers Cross’s origin and the imminent danger that will put the Multiverse at risk: The Overwrite button.
List of Alternate Universes (AU) and Alternate Timelines (AT) that will appear on this animated series, including characters without an official or specific Undertale AU/AT.
* Undertale (By Toby Fox)
* InkTale/ Ink (By @comyet / @myebi)
* Error (By Crayon Queen/ @loverofpiggies)
* Fresh (By Crayon Queen/ @loverofpiggies)
* Aftertale/ Geno (By Crayon Queen/ @loverofpiggies)
* DreamTale/ Dream (By @jokublog)
* DreamTale/ Nightmare (By @jokublog)
* Underfell (By @underfell)
* Underswap (By AU Community)
* Outertale (By 2mi127 / @outertale )
* Core!Frisk (By @dokudoki)
* Undernovela (By @pig-demon)
* Killer!Sans (By @rahafwabas)
* Fatal_Error (By @xedramon / @fatal-error-blog)
* Fresh!Ink (designed By @comyet / @myebi)
* EpicTale (By @yugogeer012)
ALL CHARACTERS BELONG TO THEIR RESPECTIVE OWNERS
Before the events of Cross and his world, many of the Alternate Universes started to die when they were abandoned by its creators.
Ink, guardian of the AUs, could not do anything else but watch how these worlds disappeared massively, in addition to having Error trying to destroy more universes on his own.
Desperate, he decided to make a truce with Error, where neither of them would get to create or erase more Alternate Universes, thus leaving a balance between nothing and the surviving AUs.
However, Ink discovered a small world that was about to be destroyed by its creator. Without Error finding out, Ink decided to enter that place, thus encountering its own creator in it: A strange man about to end his life by feeling unable to create something perfect for his two human children.
Just like Ink used to do with the creators before they abandoned the Multiverse and their creations, he helped the old man to bring him back his motivation and build an Alternate Universe by showing him the Doodle Sphere, a huge place where Ink kept the AUs he could save after the Truce.
Thanks to Ink, XTale was finally created, and the old man could even get his own name. XGaster.
[VIDEO] TRUCE
[VIDEO] TIMELINE 0
XGaster was in charge of creating the perfect world for his two human children, with a mysterious power from his soul that became stronger after meeting Ink, the guardian of the AUs.
He won enough motivation to write the perfect story in just one timeline thanks to his ultimate invention - The Overwrite button -
This power brought XGaster to corrupt his own mind and values. Overwriting his Universe into ten timelines on his quest for the perfect story.
[VIDEO] TIMELINE I
[VIDEO] TIMELINE II
[VIDEO] TIMELINE III
[VIDEO] TIMELINE IV
[VIDEO] TIMELINE V
[VIDEO] TIMELINE VI
[VIDEO] TIMELINE VII
[VIDEO] TIMELINE VIII
[VIDEO] TIMELINE IX
[VIDEO] TIMELINE X
[COMIC] TIMELINE X
======== CHARACTERS ========
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Race: Monster
Owner of the XTale Alternate Universe
His true origin is unknown. He appeared along with Frisk and Chara when said world made its appearance in the Multiverse. He possesses an unconventional soul, similar to a creator’s. With its power, he can use the Overwrite ability, materialized as a button. His main goal is to create the perfect world for the two humans and live in harmony, but despite counting with such great power, he lacked the motivation to continue with his work. Before trying to destroy his soul and disappear from said Universe, Ink appeared to stop him and help him recover, showing him the Doodle Sphere and the thousands of possibilities he had to create his own world. From that moment, XGaster would focus on creating the perfect world, no matter the sacrifices or complaints from the two humans.
XGaster would soon start running out of ideas, so he decided to choose one of the two humans to give him half of his soul, in exchange for Determination. That way turning into a stronger being, incapable of dying. After all the events that took place in the ten timelines, XGaster found his final objective: Creating one single Original Universe with the best of the others.
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Race:Monster
XGaster’s creation. Code I
Monster prince. Chara’s and Frisk’s adoptive brother.
He was always destined to grow up alongside his two human brothers and maintain peace between humans and monsters in the world created by XGaster.
He never became Flowey. However, he can transform into his Exterminator version (Flowey X) with the Overwrite button. Asriel is XGaster’s favorite “weapon”.
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Race: Monster
XGaster’s creation. Code II
Monster King. Chara’s and Frisk’s adoptive father. He’s got a strong family relationship with Chara.
XGaster never liked this creation, who always maintained the qualities of a kind man despite his miserable and lonely life, like in the other Universes. Now he’s only a being full of remorse and rage aware of the reality of the Multiverse.
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Race: Monster
XGaster’s creation. Code III
Monster Queen. Chara’s and Frisk’s adoptive mother. She’s got a strong family relationship with Frisk.
She is aware of all the events that occurred in her Universe, the true fate for her son Asriel and her relationship with Asgore in the Original Universe. In her mind, she only keeps the memory of her loved ones smiling in a peaceful and happy world before everything went out of control. That’s why she refuses to open her eyes, fearful of forgetting that image and facing reality.
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Race: Monster
XGaster’s creation. Code IV
She’s got a strong platonic relationship with Frisk.
Muffet was the first one to encourage Chara to rebel against XGaster.After the events of the 10th timeline, she was overwritten into a killing machine. She can create illusions with her poison and stopping time.
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Race: Monster
XGaster’s creation. Code V
She was the first creation who attacked her own creator. Now she’s her personal bodyguard along with Papyrus.
All her happy memories with Alphys are fake. But deep inside her soul, she still has feelings for her. She doesn’t believe justice anymore.
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Race: Human. Code VI
He appeared along with his Alternate Universe as well as Frisk and XGaster.
He eventually took resentment towards his tutor after the constant uses of the Overwrite button. After rebelling against him in the fourth timeline, not only did he learn to use the Reset, but his Determination became rather noteworthy for XGaster. He was then forced to share his soul with XGaster’s, obtaining half of this purple soul. After that incident, Chara began to lose his mind, turning into a being who only wanted to hurt others. Having been corrupted by XGaster, he became part of his collection of creations. Created only for his satisfaction based on suffering.
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Race: Human.Code VII
He appeared along with his Alternate Universe as well as Chara and XGaster.
He always had a passive attitude towards XGaster’s treatment despite being filled with hatred. He was temporarily overwritten by XGaster to test a genocidal alternative. After that event, Frisk gave up invaded by fear and distrust, losing his Determination like that. Before XGaster erased him permanently from his Universe, Chara convinced him to give him one last chance, becoming the vessel for his big brother’s soul, that way being one individual, just as it should be in the Original Universe. That’s how XGaster’s final experiment began, named the X Event
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It’s XGaster’s master experiment. Frisk’s body with Chara’s soul.
The purpose of his creation is to give a human with Determination the chance to create something new with the Overwrite ability. However, XGaster rejects all of its creations and takes its ideas to refine them on his own, using it only as a tool. Due to the awful treatment, it’s received, the experiment tried to end its own life to prevent its tutor from still overwriting his universe, but after finding out that the other half of the purple soul wasn’t in his possession anymore, it would give everyone their memories back to rebel against XGaster and obtain full power of the Overwrite button, plan which ended up failing after an intervention from Cross (Sans).
Cross destroyed Frisk’s body and kept Chara’s soul, becoming the new X EVENT. Despite sharing some of the human’s abilities, Cross is unable to overwrite, as his monster soul isn’t compatible with the purple soul’s abilities, developed exclusively for a human vessel.
XGaster’s soul properties prevent the human vessel from physically growing in any timeline, giving them the appearance of a child.
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Race: Monster/Robot
X Event’s original creation. Current property of XGaster. Code VIII
He was initially an idea discarded by XGaster, so he never appeared in any of the previous timelines. When the X Event initiated its training, it decided to use this resource and make him a robot with many qualities, the most outstanding being an unstoppable Royal Guard, an idea that gets XGaster’s attention and giving origin to the final concept for his perfect story.
Mettaton has an insatiable appetite and always eats anything in his way. His favorite food is souls, both humans, and monsters´.
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Race: Monster
XGaster’s and X Event’s creation. Code IX
He’s one of the initial creations on the first stage for the perfect universe developed by Frisk and supervised by XGaster.
His kindness and optimism captivate everyone else, even getting to confuse XGaster.
More than a simple creation, XGaster sees him as a closer relative, as he sees in him the innocent and pure side that he lost long ago. Papyrus feels great remorse and disappointment towards Cross after having been exterminated by him in the past.
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Race: Monster
XGaster’s and X Event’s creation. Code X
Better known as “Cross” or “C”.
He was trained along with his brother Papyrus to become a Royal Guard in order to protect Frisk after he broke the Barrier and brought peace between humans and monsters. His Genocide core code was restored by Frisk, forcing him to destroy him forever, releasing the true X-Event that was inside him, taking the form of Chara. Cross destroyed half of Chara’s soul and sealed it in his own body to prevent another catastrophe. He also calls himself the new X Event.
His real name is Sans, but Frisk gave him the nickname “Cross” because of the design on his clothing.
Cross wants to obtain the full power of the Overwrite button to make his own utopic Universe where everybody can be perfect the way they are, however, he was unable to use the Overwrite button, living in the void of his own world for a long time until he meets Ink.
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Race: Monster
XGaster’s assistant.
Created with the only purpose to compile all the data generated during the Timelines, as well as keep XGaster’s personal notes during and after the X-Event development. XGaster had all his trust on her until he discovered she was part of Chara’s rebellion in the 4th Timeline. Alphys was overwritten into a loyal and emotionless assistant. She is still able to think for herself, but she doesn’t want to get involved in trouble anymore and only focuses on obeying her creator.
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ADDITIONAL CHARACTER INFORMATION
-XGASTER:
-XGaster’s soul is of a purple color, like his tears and blood.
-His creations and the two humans gain this same feature once they’re overwritten/corrupted by him.
-He can use his creations as puppets, either with movements or to speak.
-When he’s sharing his soul with the X-Event, both can share some of their memories, thoughts, feelings, and physical health.
-He can also use the RESET button using Chara’s Determination to go back in time when he’s not able to use his purple soul, however, he considers that power inferior to his OVERWRITE.
-XGaster can create Artificial Determination in his corrupted form.
-The true trait of his soul remains a mystery, but it is considered as a type of Perseverance.
-XGaster adores chocolate milk, however, it has similar effects of an alcoholic beverage on his body.
-XFRISK / XCHARA:
-Frisk loves spiders and other insects. He has a special nickname for Muffet, which is “Muffin”.
-Chara dislikes any type of small animal.
-Chara feels inferior to his younger brother when it comes to appearance.
-It’s unknown if Frisk and Chara are biological brothers. Chara has the title of older brother since Frisk considers him the strongest and most astute.
-Frisk and Chara are male.
-In their X Event form, XGaster uses the pronoun “it” because he doesn’t consider them as human beings anymore.
-CROSS:
-Cross and Chara love chocolate but have no relation to each other.
-Adding to this, Cross gained a liking for tacos thanks to Ink, who showed him said dish after meeting for the first time.
-Cross hates his royal guard outfit.
CROSS X EVENT MODE:
-When Error took their soul, both Cross and Chara lost control over their body, corrupting themselves and turning into an unstable being, having only a few hours to live thanks to Chara’s determination. They’re fighting for the body’s possession, changing their appearance every time (Chara’s body or Cross’ body). Thanks to Chara, Cross was able to take half of Original Sans’soul and recover their physical body. With a new monster soul inside, Cross recovered his body and He has full control. Chara only gives him advice and The X-Event Power to accomplish their purposes.
- When Cross is sleeping, Chara can take control over his body, even if he doesn’t have a physical soul. His soul can be extracted out of his body when he is distracted and receives an attack or even a simple hit (like Sans’s special attack).
-ALPHYS:
-She can put any Universe or individual under quarantine and use them at will.
-All the information XGaster gives her is saved in the shape of paper sheets. These papers have the same mechanic as the LOAD/SAVE from the Original Universe. She’s the only one besides XGaster who can use these options after using the Overwrite button.
======== THE OVERWRITE BUTTON ========
XGaster’s master creation made from his own soul. This button is able to create a new and different story over an existing Universe by erasing or modifying its current course and code forever.
All loads files get erased.
The RESET or TRUE RESET only allows going back in time right after the Overwrite button was used in the respective Universe without creating a new timeline/alternate timeline. Just a very amount of DETERMINATION will be able to change the time and space of the new code generated by the OVERWRITE button.
The Overwrite button can be split into several fragments. This implies that its properties will be reduced on each user, only allowing them to alter a few timelines or small code fragments temporarily without causing major changes in the invaded universe.
The fragments of the Overwrite button, located in the users’ soul, must have at least 50% of DETERMINATION.
Each fragment of this button can be programmed before to be used only by a monster or a human. Any being other than the race of the fragment’s user can not use the button’s properties.
When the Overwrite button fragments are complete, the user gets access to all of its power.
OVERWRITE BUTTON’S LIMITATIONS
- It cannot overwrite an entire AU or the Multiverse itself if the user has only a fragment of the purple soul.
- If the user has half of the overwrite button, It only allows them to corrupt one timeline and the code from objects, humans, and monsters that can be found there. The damage done can’t always be permanent or successful.
- It can’t be used over something or someone that is not usual in the Multiverse, like beings/objects without a specific code and original/unique characters that don’t exist in any other alternate universe.
- The true owner of each fragment must have at least 50% of their race’s HP to use this power. Determination allows each owner to exceed their limits during an Overwrite process, it also let them refuse to die in the case they’re out of HP, so they can get a new physical soul and keep using the full power of each fragment again.
- The Overwrite button can only be destroyed by the current user and only if it’s complete.
