#.(gaster had his Accident)

[cursedthing]

.showering was a mistake we drew a parallel between youmjer and gaster, of all things

[o-sunny-day]

SCROLL FOR @forgettable-au ANGST :D

ok so ((WAILS LOUDLY))

WE KNOW HOW THIS GOES *breaks knuckles* ITS TIME TO TEAR APART MY ART BECAUSE PASSION

trust me, im a proFESSIONAL yapper at this point

This whole thing takes place within my own headcanon that “The Quiche Room” was one of many of Sans and Wingdings’ little hangout spots. They also really liked the echo flower there (maybe they planted it themselves-) Maybe thats why Papyrus is so unnerved and disturbed by echo flowers now…

Notice, the echo flower grows as they grow!

Oh yeah! I had fun drawing them grown in their kid outfits for 2. Wingdings can finally see his ankles

2 is also sorta a reference to my Radio Star comic, same stuff they did as kids, Wingdings working and Sans assisting, They haven’t changed too much yet. haven’t gotten the lab job. yet.

in 3, this is after they get the job at the lab and Wingdings realizes its a great place for supporting his unhealthy habits of seclusion and emotional repression. The echo flower is repeating something Wingdings said a while ago. I dont know what- fill in your own angst I suppose (I cant do EVERYTHING around here)

in 1 and 2, the light sources… are each other. Sans n Wd. Theyre each others lights. Each others stars (cries loudly and noticeably) but then for 3, the only light source is the echo flower. Yknow. The echo flower. with wingdings’ voice

4 is how the quiche room looks in the game 👍 Dunno whats sadder… Wingdings’ voice being removed because he’s in the void now, or because someone just talked over it without a second thought.

Oh yeah, and its empty because Sans and Papyrus don’t remember that ever being a place they hung out.

Yeah.

Yeah, im crying too. Its okay, let it out.

SANS AND GASTER SANS AND GASTER SANS AND GASTER (PLEASEPLEASEPLEASEPLEASEPLEASE) I need them to interact i’m gonna have an aneurism.

THIS PART IS GETTING ITS OWN SECTION BECAUSE CMON MAN, ITS SANS AND GASTER

It was said in this post that Sans knows he was involved in whatever accident Gaster had, that had MAJOR consequences, and made everything and everyone different.

That makes me wonder, does Sans feel any guilt?? like subconsciously or not, he knows he was involved, so does he suspect he could have done something to stop it, or did something bad, and he was at fault in some way?

I DONT THINK HE WAS

so in 5, Sans is asking “what happened.”

What happened to him, why is everything like this, was it his fault? what did he do? what did he NOT do???

And Gaster just replies “Nothing that wasn’t my own fault.”

OK THATS ENOUGH. WHITEBOARD DOODLES, ATTACK!!!!

also- I PROMISE IM WORKING ON THE DTIYS 😭😭😭 IVE GOT IDEAS IDK HOW TO EXECUTE EM

Heres a thing I made/am working on(???) that was inspired by the dtiys though :3

[gastersreturn]

YOU HAVE FOUND HIM

READ IT ON : ComicFury - DeviantArt

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GASTER'S RETURN MASTERPOST

┗━━━━━━━━━━━━━━━┛

PROLOGUE

1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25/26/27/28

CHAPTER 1

Scene 1 : 1/5- 6/10 - 11/15 - 16/20 - 21-26

Scene 2 : 27-31- 32-35 - 36-40 - 41-45 - 46-50 - 51-55

Scene 3 : 56-60 - 61-65 - 66-70

------------------------------

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GASTER'S RETURN - FAQ

What is the plot ?

Everything is in the title, it's a story about Gaster returning from wherever he was after his accident that broke him between time and space. This story is set after the Pacifist ending, months after monsters have been freed from the Underground

What are the main themes of this story ?

The story will focus on the difficulties he will encounter about this return in a brand new world, about searching for his place in this new setting, and letting go of the old one, while also putting some light on the impact it all had on his family and friends.

Is it an AU (Alternative Universe ?) ? And how close it is from Undertale ?

Yep, it is an AU. But I want to keep it as close of the canon as possible, in order to really tell a story based on the game. But it won't be exactly the same of course, my own headcanons, and other interpretations for narrative purpose, will be in there.

How did you get the idea of making this AU ?

At the very beginning, in April 2024 kinda, I started to make some random drawings of Gaster, and some KingDings (AsgorexGaster) sketches. It was some really light stuffs, Gaster doing random casual things on the surface, but then slowly a story began to form into my mind as I started to ask myself questions about the why and how. I decided that I wanted to make something out of it for once, so I began to study writing and comic making for a few months in order to start an AU for this idea, and here it is!

Wait wait wait, does that mean there will be KingDings in this AU ? :0

Well, no not really. The main focus of this story won't be romance at all. At this point of their lives, I don't think neither of them are ready for a relationship (if I want it to be healthy). So no romance, but if you want to see romance, between them or any other characters, I can't stop you x) (As long as it's legal of course...)

Why is the comic separated into scenes?

The comic is organized like this, every new setting is a new scene. It's how I organize my writing and I wanted to make it explicit

(Also, makes it easier for researching)

When will the next pages come out ?

I try to make approximatively 5 pages every two weeks

How long is this going to take to complete the story ?

Long as hell, I have written a prologue and 3 chapters to finish the story, wish me luck

Am I allowed to make a dub of the comic ?

I honestly don't know if anyone would ever want to make one, but if you do, sure you can ! (as long that you credit me of course)

You are also allowed to make fanarts, or any fanwork based on this AU, again I'm not sure if anyone would, but just in case x)

Am I allowed to repost this AU somewhere else ? Or to make a translation ?

Mmmh….I would allow it, but I want to be informed of it before you do. DM me to ask me, and if you see someone else than me reposting it somewhere, please tell me ^^

The only places I post this AU in here, on DeviantArt and on ComicFury, anywhere else isn't me

Russian translation of the Prologue just here !!

I have other questions !!!

Then you can ask them ! I will answer the ones who are interesting/doesn't require me to spoil my own story

------------------------------

WILL YOU KEEP SEARCHING ?

[hainuwelle]

The third man theory

Note: This theory takes as starting point Aurora's Fun theory. It states that the invention in which Gaster fell was a new version of a warp door that would have allowed the monsters of the underground to escape to a timeline in which the war against the humans never happened. If this experiment were to work, it would have allowed for a happier ending than the True Pacifist one, because more accidents and deaths would have been prevented.

Sadly, Gaster's experiments went wrong and he was scattered "across time and space". The only other time in Undertale this expression is used is when we call Papyrus in Sans's room, the one that gets us lost in a seemingly endless darkness when we enter it, with a door that suspiciously looks like Mystery Man's grey door and Deltarune's warp doors. This key expression used by Papyrus tells us Gaster's creation and untimely demise should have something to do with these doors.

If this theory is correct, the invention in which Gaster fell would have been under our nose the whole time.

With the FUN theory video in mind, something about Mr. Elegance's dialogues caught my eye.

Evidence 1 - Mr. Elegance, if we didn't previously talk to Jigsaw Joe:

Evidence 2 - Mr. Elegance if we previously talked to Jigsaw Joe:

For a flaming teleportation door one would assume to be magical, the vocabulary used to talk about it sure sounds mechanical and mundanely machine-like : « Fix up », « working on it », « got this door workin’ », « it might break », « fixed that door », « it should work without any issues ». Intriguingly, it looks old, and yet, it is new to the Darkners, who have never seen it before. Is it really Darkner technology?

Of course, to an experienced Undertale player, it looks familiar, similar to the one to Sans's room.

This brings us to my question: Why did Toby Fox add these two different Mr. Elegance dialogues about this door? What purpose do they serve?

It can't be to alert the player that they could malfunction if we haven’t previously talked to Jigsaw Joe, since they always work properly regardless. It’s not like this triggers a side quest asking you to talk to the puzzle man if you don't want a 1/6 chance of the door teleporting you into the void. And they don't serve a comedic purpose either. There is no joke, no punchline. So why warn us about the breaking hazard, if the warp doors never break in the first place ? Why specify that 3 people are needed to get them to work smoothly?

Because this isn’t really about the Scarlet Forest shortcut. The door might not break in the game, but it might have broken somewhere else. This is really about what went wrong with Gaster's experiments.

Time to bring in evidence 3:

First, let's note that this tweet isn't exactly talking about the same situation as in evidence 1 : Mr. Elegance talks about a door that two people got to work and that might break, while Toby Fox talks about a machine that's already broken and that two people could never repair.

However, evidence 2 tells us that when three of them worked on it, the machine should work without a problem. So if we assume that these dialogues are really about the creation that led to Gaster’s demise, this means that the reason things went wrong is because one person was missing.

Two people worked on the machine instead of three, which led to Gaster's disappearance. Yet, we know that two people were trying to repair the machine once it was broken. This means that after Gaster's disappearance, the missing person came back.

Now let's imagine that Gaster formed a trio with two other colleagues that we'll name X and Y. The Royal Scientist is working on a door-shaped machine that would free the monsters from their imprisonment. As the fate of the Underground lies in his hands, a lot of pressure is resting upon his shoulders. The role that X and Y had in this creation is unknown. Gaster could have even built it on his own. But thanks to Entry n°17, we know that shared his experiments with two other people. And thanks to the Japanese translation, we know he was rather close to them.

After the construction of the machine, Gaster and X try to get it to work, but without Y. Maybe they walked away from the experiment, maybe the other two didn't trust them enough, we don't know.

Despite this, they manage to make it work with just the two of them. However, what Mr. Elegance predicts happens, and something goes wrong. Two people just wasn't enough to assure that the machine would work properly. It's too unstable. It malfunctions. Gaster falls inside, is shattered across time and space, and the machine breaks.

Now let's come back to the end of Toby Fox's tweet. ”Neither of them could fix the machine, no matter how hard they tried. No one can." Notice that "neither of them" means precisely two people.

After the incident, Y comes back, but Gaster disappeared. The trio is now a duo. Y and X do everything they can to repair the machine, but can't. No one can. Because Gaster, the person necessary to its reparation, is no more.

If this theory is right, what are X and Y’s identities? And why was Y absent during the creation of the shortcut door machine? A lot of questions have yet to be answered...

[aus-from-undertale]

Sans centric aus

("but heart mod, isn't that all of them?")

(well yeah- but um ... Yeah... I guess...)

Original Sans

Ut-mob- gangster sans takes care of a strange human

Reapertale- reaper sans messed up the job

Sans the seraphim-sans takes Frisk soul and opens the barrier

Darker yet darker sans is a gaster experiment

Handplate- still being experimented

Stand in- Frans au, where sans can't get over a soulless pacifist run

Littletale- sans is smol

Timetale- Salphys au about sans life

Weabootale-Shitpost sans

Insomnia- Sans sleep is having a bad time

Cybertale- monsters surviving with technology wants to go back home

How to greet a new pal- Undertale sans ends up on Underfell universe

Underlust reimagined - sans got it hard (pun)

Ut gangster au- Mob sans!

Something's missing- is it fair to put this here?

Hollowtale- hollow knight lives with the bone bros

Unexpected guests- bones bros gain pet gaster blasters!

Bark at the moon - the bone bros BECOME gaster blasters

Underorquestra- sans is a maestro

Leaf gaster bros-daily life of the gaster bros

Flowey possession - Flowey helps sans protect papyrus =)

Anothertale- sans tries to stop genocide from the beginning but it gets worse

Doormaker- sans from Undertale and deltarune are the same!

Merges

Echotale- gaster and sans merge after an experiment gone wrong

Mergetale-Frisk and sans merge after an accident

Bromalgamate-sans and papyrus merge accidentally after a lot determination

Gaster blaster- Sans merged with his blaster!

Damaged!tale- after a genocide route gone wrong, papyrus, sans and Frisk become one!

Fatal!error- literal merge between Error!sans and Aftertale sans

Paper crane- merge of many sans

Sixbones- amalgamation between sans and papyrus

Underfell

Soulfell- edgy sans loves hot topic

The skeleton games- post pacifist sans lives nearby a vampire

Feline good- sans became a cat and wants to turn back!

Heavenfell- Frisk goes to die and ends up on the underground

Songfell- Frans au where Frisk is a priest dealing with a large monster

Underswap

Buttontale- Sans is coraline

Underforgotten- genocide route where just sans is alive :(

Bad x Good sanses

Warverse- every au collides with each other and a war begins!

Let dust be a reader!- the bad sanses wants to chill

Dreamtale- Story about the life of the twins Dream and Nightmare

Blue and the bad sanses- blue is being really underappreciated!

OC

Killer!sans- after many resets, sans accepts a proposition

Ink!Sans- born as a sketch, this sans has no emotions

Eclipstale- other take on dreamtale

Dreamtale 0- more sinister beginning to the dreamtale story

Errortale- someone who likes to watch novelas and cause chaos!

Aftertale- after many resets, sans finds someone on the menu

Undertone- blind and timid sans deals with a genocide

Alterverse- Sans with the toriel role!

Underfresh- a parasite with good vibes!

Asylumtale-Sans is not well

Paperjam- mix between ink and error!

Parasitetale- Sans will do anything to live

Terrortale- sans that is a mix between Underfell and underlust!

Tidetale- a robot created for sans!

Naturetale- sans is vegan

Goth- ship child

Chance!tale- magician sans with a complicated past

Ferntale- sans with plant powers

Undersource- sans won't take more suffering any longer

Soulbound- sans injects himself with determination and it doesn't go well

Impostortale- a copycat ends up on the underground

Underwar,- it's not a war between monsters and humans, but monsters and demons!

Undergut- the underground is HUNGRY

Sintale- sans is sloth

Anxietytale- sans is anxious

Basic!sans- sans had his code messed up :(

Sunny- sans who has a bit of every character within

Irrsintale- bone bros were formed by crystals!

Fileverse- sans is born from a drawing!

[datrb]

Theory time! And explaining my vision

So... "Node", "I", "Eye" or "Ai", right? What if this entity's body doesn't actually belong to it?

This is just my little brainstorm that i did because i needed to base my design off something, so i chose the "Gaster route", if you will.

Node and the body we associate with Node are originally two separate entities. Node itself is a being without a body. Internet at large, if you will, its "antivirus".

And the original owner of the body is a regular stickfigure. I imagine the og owner to be some type of researcher/scientist, who may or may not have had some type of a relationship with the Conductor and who's research was mainly focused on the laws of internet and its rules, which is also how he came to meet the Conductor.

But at some point some form of an "incident" happened. Was it an honest mistake? An accident? A murder? Maybe a coincidence? Who knows! The only fact here is that as a result of this incident the stick died and his code was torn across space, going dormant.

That is until the inciting incident of Animation Versus' story mode, where for one reason or another there was a disturbance in the internet, causing the entity known by many names to awaken. But for that it would also need a body. So it collected and reconnected the pieces of code that were scattered, recreating the original stick's body and taking it for itself.

Of course, some pieces were lost in the cracks, causing the face to be lost entirely, the whole body being discoloured and translucent, and the clothes to be warped, as some pieces of other broken codes were used to fill in the blanks.

Tl;DR: Node's body originally belonged to a stick who got "Gastered", and then recreated and taken over by the entity of many names.

[ilovemlp39]

After months (and saving the file wrong), I finally got her reference sheet done ^^

For those who are new, this is my second Sans OC named "Jiko" who's an assistant for my other Sans OC named "Santan".

Other Characters Featured:

"Santan" belongs to: Ilovemlp39 (me lmao)

"Passion" belongs to: @corruptednekoart (sorry for the 2nd ping lol)

More info under the cut

Basic Info About Jiko:

* Age: 15

* Birthday: June 3

* Sexuality: Pansexual

* Trans-Fem

* Pronouns: She/They

* Height: 4'5"

* Job: Assistant/Waitress for Santan's Tea House

* Languages: Japanese, English, Sign Language (ASL)

Description:

* Is an outcode

* Had to get her right wing amputated since it was terribly damaged from an accident at her last job at a circus

* Partially deaf (on the right side) due to the circus incident (sometimes when it gets too hard to hear, she'll use sign language with Santan)

* Does NOT know anything about Narra or his "special orders"

* Loves wearing skirts/dresses (especially any cottage-core related ones)

* Currently in hiding from the circus she used to work at

Weapons/Magic:

* Boomerang (has spikes to do extra damage)

* Hallucination/Illusion magic to trick the opponent in seeing things that aren't real

--> Doesn't really use this move unless very threatened or wants to be in their own space

* Blue magic (that shows to be a lavender color)

* Teleportation (hasn't figured that part out yet)

* Gaster Blaster

--> Has blue gradient feather on the side

* Bones (what else do you need to know, they're bones?-)

About Her Job:

* Works as an assistant/waitress for Santan in the Tea House (located in an undisclosed Outcode AU)

--> Helps serve the patrons by writing down orders, picking up & deliver the orders

* Goes on foraging trips with Santan whenever they need to do a supply run

* Her old job in the circus, she used to be a daredevil and the star of the show (due to from how people loved her old colored wings and how fast she flew)

--> But she had to leave the circus due to her life being threatened and the toxic work environment

* Still does little circus tricks as she works and it entertains the customers

Personality:

* May appear childish at times

--> Mostly because she wants to regain her lost childhood

* Very bubbly person

* Optimistic, but wary

* Very loud at times

* Can and will cry easily

* Gullible (will fall for any prank/joke)

Relationships with Other People:

* Santan: Boss and a supportive older brother

--> Usually calls him "Kuya" (meaning "older brother" in Tagalog)

* Anarchy (belongs to KevinZheChair): Santan's boyfriend

* Passion (belongs to CorruptedNekoArt): Friend (also a good gossip/shopping buddy)

* Shin (belongs to Frozen-Fr): Friend

Likes:

* Aquariums

* Manta Rays

* Jasmine Tea

* Sesame Balls

* Mint chocolate (anything)

* Drama shows (mostly K-Dramas)

* Peppermint Mocha

* Cold weather

Dislikes:

* Circuses and anything related to circuses (especially the one she used to work at)

* Fireworks

* Clowns

* Thunderstorms

* Hot weather

Extra Info/Trivia:

* Has a pet hedgehog named "Chihari" (who turned out to be immortal)

* Is 100% a Pinterest user

* Has nightmares about getting dragged back to the circus

--> Especially ones where Santan would betray her via giving her back to the circus

* Planning on saving money to get a prosthetic wing to replace the amputated wing they had before

* Had to dye her wing a different color because her original wing color would have been incredibly easy to spot (Santan helped her to dye it to the current color)

--> Her original wing color was a sunset gradient

* Has a tendency to pluck out her feathers in frustration/extreme stress (though she's getting better in not doing that anymore)

* Being homeschooled by Santan

* Favorite sea animals are the whale shark and spotted eagle ray

* When they have time, she and Santan would teach each other their languages (she would teach Japanese, while Santan would teach Tagalog)

* Occasionally makes bird noises (and would use that to prank Santan into thinking the smoke alarms needs batteries)

* Likes to carry around sweets in her pockets

[eyestrain-addict]

Deltarune chapter 4 spoilers

Before ANYONE tries to say it, no, the person Kris was talking to on the phone isn't Gaster, and I am 100% certain of this. I haven't found all the secrets yet, (in fact I was mostly just trying to get the 'normal' playthrough done, borderline going out of my way to avoid secrets) but I've noticed some people haven't realized yet one of Toby's holdovers from homestuck is the importance of typefaces in dialouge. Characters rarely deviate from certain cadences. For example, Sans and Papyrus obviously speak in fonts, but papyrus always talks in all caps, while sans 'never' uses uppercase. We may never have been explicitly told any of the dialouge is Gasters, but we have a pretty good idea of what his dialouge sounds like (outside of Wingdings)

GASTER.

ALWAYS TALKS.

LIKE THIS.

So no, I'm 100 percent certain the person on the phone isn't Gaster. My guess? Either Asgore or Carol. Carols dialouge sounds the most like the phone dialouge. Though Asgore is connected to all the symbols (goes to church every night, living off the mayors dime, and was the previous police chief.) and he has his backroom with the corkboard.

Again, I've only done the main route so far, thus only scratched the surface of new info (haven't even done the weird route yet, though I found the area) but I'm certain Asgore has more to do with this than he's letting on. My pet theory is that Dess isn't missing, but passed away, and the Mayor is trying to find a way to bring her back via dark world with Kris and Asgore's help.

(Off topic but Chapter 4 with Gerson honestly really affected me, I dont know why. I had already figured out he was dead before you even leave the first dark world, so i just kept saying to myself 'Susie,,, He's gone,,, we need to go...' and almost cried when the leitmotif of 'battle against a true hero' started playing during the final fight. And side note if you check kris's phone when you get back in their body, they wiped the messages and call history. I found that completely on accident.)

Lotta feelings right now. Im sure I'll have more later. But theory crafting for this game is a team effort and we all gotta pitch in. I can't decompile the game, but I can remember useless info.

TL;DR Kris's phone call was not with Gaster, and I think Asgore has more to do with this than he's letting on. Kris continues to be a complex character.

[forgettable-au]

Is papyrus subconscious replaced by gaster or dose he just have his memory's

So, Wingdings was first

The the accident happened, guy got shattered across time and space

And Papyrus was kind of an empty shell if u get what I mean

He had no real memories of anything, he just knew Sans was his brother and some other basic things

He gets vague memories or strange feelings sometimes towards things he thinks he should know about, but not much

Papyrus current personality developed over time!

[junipers-insects]

@lemonadesys here is the short 1,400+ summary for the Mostly alphys and kinda sans sci centered au lmao

Also I drew something for it back in January I forgot about

So basically I just really love alphys lmao

I called this au Labswitch because sans and alphys technically “switch” labs

in this au sans is the next royal scientist, by accident. After Gaster and his followers disappearance, Sans ended up as the royal scientist instead of disappearing with the followers. That’s because he was just an intern at the laboratory at the time and wasn’t a part of the group of Gasters followers.

After their disappearance Sans, and every one else, forgot about the previous scientists, Sans becomes the royal scientist because, well, because there were no one else left. Luckily he is quite capable and smart and took on the role of the R scientist with little to no hardships.

Until Asgore asked him to continue to work on human souls, and since he didn’t do the initial research on the souls that took a while for him to master and in the end resulted in him overworking himself down to the bone. After seeing Sans fall asleep at work numerous times Asgore suggested they hire an assistant for Sans, which Sans (begrudgingly) accepted.

Here comes Alphys with her robot with a monster soul, impressing both Sans and Asgore and meeting all of the criteria and beyond. She is immediately hired and becomes Sans’ assistant, helper, advisor and close friend.

Sans, now with Alphys, continue their work on the human souls, and soon they have a breakthrough.

Alphys extracts Determination from the human souls. The power that their whole research was based on.

They start experimenting with flowers first. One of the flowers disappears. Over all the flowers were a half success.

At this part in undertale asgore asks monster families for fallen down monster in the brink of dusting for Alphys to inject determination to them for soul research. But since Alphys isn’t the Royal scientist she can’t make these kinds of requests from the King, only Sans has that kind of authority, and Sans doesn’t agree with this just yet.

Alphys thinks they should conduct this experiment as quickly as possible, the flower was proof that Determination works. Sans wants to wait and try to conduct more experiments even though the next logical step would be to experiment on monsters, but the potential for the experiment to become unethical kept him from proceeding with it like Alphys wanted.

So Alphys has no choice but to comply with what Sans thinks is right and they continue to experiment on more plant life, even if the results always ended up inconclusive.

Alphys, frustrated by the lack of progress, goes behind Sans’ back and requests Asgore for fallen down monsters, even though she technically doesn’t have the power to make this request Asgore trusts her and does as requested in the name of progress and their freedom.

Sans, before becoming the Royal scientist, used to live with his younger brother Papyrus in the capital city “New Home”. After becoming the R scientist, he had to move to the laboratory and started living there instead, leaving his brother behind to live alone. He often visited Papyrus, having lunches together and sending letters to each other. But after his soul research started he visited less and less, so with Alphys’ arrival he finally had more free time to visit Paps again. Sans being on his Asgore mandated break was the perfect condition for Alphys to smuggle in some corpses.

She injects the bodies with determination, nothing happens. She keeps injecting them with DT. This has to work or she’s astronomically fucked, in other words, fired.

Sans comes back early catching Alphys in the middle of her experiment, but before he could scold her the bodies start waking up. Instead of scolding her, he apologized for stalling so long and that he should have trusted her to be right.

Of course it couldn’t have been this easy. The monsters bodies started melting into each others, amalgamating and creating unholy forms, disappearing and appearing in the dark halls and rooms of the laboratory.

Alphys was devastated. Going behind her superiors, her friends, back, and doing that to those poor monsters...she can’t live with herself with that.

Sans tries to comfort her, saying that one way or another this would have happened eventually, they would have done the experiment soon enough together. But Alphys wouldn’t listen or believe his words, she’s the one that should be blamed for all of this and she...she can’t show her face here anymore. She has to leave and she can’ go back to Waterfall, everyone knows her there.

Sans, feeling bad for her, has a suggestion for her.

The reason for his visit to his brother was that Papyrus is moving to Snowdin, and he was looking for a roommate, specifically Sans. But Sans can’t go with him, he is the R scientist he can’t leave even if he wanted to at the moment.

He suggests Alphys move in with Papyrus. They know each other and Sans trusts Alphys enough to let her live with his brother, and to look after him. Plus no one in Snowdin knows her, all the letters from the families of the fallen down monsters would be addressed to the lab in Hotland.

Alphys accepted his offer and quickly moved in with Papyrus. Paps was happy to have a roommate again.

Sci was once again alone in the laboratory, with more work than ever. He ended up shutting himself in the lab, put all of his soul research aside, trying to find a solution to help the Amalgamates. He ends up neglecting his brother, no more visits, since Papyrus lives so far away now, and he can’t find the time to read his letters to him anymore, let alone send his own.

Meanwhile Alphys, shuts herself inside her own room, rarely coming out. Until Papyrus encouraging her, pushing her to go out as much as possible, encouraging her to interact with the locals etc.

She’s often annoyed with his persistence, but also grateful for it, because if not for him she would have… She’s grateful to have the brothers as her friends. Soon she discovers the basement of their house, and being a scientist at heart she starts her own independent research… (BOOM labswitch)

Mettaton barges into the laboratory looking for Alphys. Instead he finds Sans, alone, and surrounded by nightmarish creatures.

Both Sans and Alphys within this whole mess have forgotten about Mettaton and his checkups and upgrades. But Sans didn’t build Mettaton so he had no clue how to help him. The skeleton suggested looking for Mettatons blueprints, but the robot refuses for anyone to touch him besides Alphys, so Sans has no choice but to direct Mettaton towards Alphys.

The robot finds the former scientist and soon he starts having his checkups at her new secret laboratory.

After everything , everyone settles down into the new normal. Until Papyrus decides to join the Royal guard. Undyne, the captain of the guard, eventually takes him under her wing (fin?) and starts his private training (cooking lessons). Soon Paps and Undyne become best friends and she often comes over to Snowdin to hang out with him. There Alphys and Undyne first meet and develop feelings for each other. But Alphys full of guilt didn’t want to get too close to her in case she finds out what she’d been lying about this whole time =, so she starts avoiding Undyne as much as possible by hiding deep in the Snowdin forest. One day she wanders in too far and finds a dead end with the giant door to The Ruins. She starts spending more time there and starts using the door as a confession booth almost. One day someone beyond the door answered (Toriel). They become friends and converse a lot. And The Promise also etc. etc.

A human comes through the door .

Here the au diverges into neutral, pacifist and genocide timelines.

In neutral everything is the same as in undertale: toriel stays in the ruins, you fight asgore then omega flowey happens etc. we all know that. But there is an addition of Alphys never opening up and either going back to the lab to help sans with his research leaving paps alone again. Depending on who you kill she has different reactions but there is literally so many neutral routes in ut I’m not writing down all of the scenarios

in pacifist you help alphys confess to undyne and also tell everyone bout her mistakes and also help sans reconnect with his brother besides that everything is the same not counting the more minor details.

In geno you fight Alphys who has sans’ help. He shares his meta knowledge with her besides that everything is the same not counting the more minor details.

[undertale-fic-librarby]

Hiii I saw you were good at finding undertale fics! I wanted to ask if you could find me slowburn fic with gaster (with possibly eventual smut/smut?)

Howdy, thanks for asking! Here are some fics that might fit what you're looking for!

Dark, Darker, Yet Darker by platonicharmonics (Mature, Complete)

The life and times of Dr. W. D. Gaster, and the important people in his life — from the dawn of the Human-Monster War to the Accident.

Alone Together, Across the Multiverse by WolfGod369 (Explicit, Incomplete)

Gaster searches the multiverse for the scattered pieces of his Soul, finding that you (the Reader) somehow bound with one such fragment. Forced to take you with him, you slowly bond over time, traveling the multiverse together on your now-shared mission. What starts out as a cold, tense relationship gradually evolves into an actual relationship with the former Royal Scientist.

Piece by Piece by words_to_escape_by (Explicit, Complete)

A story where you find yourself somehow connected to a mysterious monster- one that invades your dreams, creeps into your reality, and somehow, gives your life a bit more meaning and excitement. To help him, you decide to hop through timelines and parallel universes (read- AU's) to find the missing pieces of his soul. And you can't help but come to find him... interesting. This is a W.D. Gaster x Reader fanfic, with plenty o plot and fluff sprinkled about places. Be prepared for a slow, slow burn. Also, my first fanfic, so please bear with me while I learn...

Rule of 3's by kibbles_n_kat (Explicit, Incomplete)

You spend your days reading and making deliveries for your carrier job, life is pretty normal. Weeeell, that's until you meet some well dressed skeleton brothers under..... uncomfortable circumstances. But that's alright! You'll work hard to make up for past mistakes. Relationships may grow although, someone might get a little "handsy" in the future. Welcome to my very first fan fic, but certainly not the last ;3

Soul of Fire by TrinTerrance (Mature, Incomplete)

It had been seven years since Monsters resurfaced, and tension between the human and monster races was finally beginning to reach a boiling point. You had just graduated college, and could barely make due with your grocery store job. With attacks and riots beginning to plague the city, living alone in your run down apartment was slowly becoming harder and harder to bare. But one night, upon finding yourself amidst a dangerous bar fight, a tall dark stranger appears…and saves your life. This is how you meet W.D. Gaster. The man who could single (or multiple) handedly change everything.

[monodramatic-cannibal]

Renegade!Geno

Info post about the au

(If characters seem OOC ((Out Of Character)) it's beacause I'm going off of my own interpretations/headcanons/fandom versions. So please be aware of that)

More info under the cut (Info is subject to change at any time. Info may be added to as well)

-Jobs in the group: building upkeep, as well as helping Sci out with projects, sudo-leader 

Weapons of choice: gaster blasters (larger the the other blasters, and more summanable bones than the others too, blue attacks  (due to the DT he has more mastery over his magic)

-Head canon voice: ???

-One of the more smarter people in the group. Acts as a sudo-leader when Sci isn’t around.

-Has incredible luck. Can walk out of life or death situations almost completely unscaved. Pretty much luck is always on his side on situations, but this luck may be to the detriment of the people around him as the luck doesn’t extend to them. 

Reaper/Death is utterly baffled by this luck.  

Reaper/Death started to follow Geno around after Geno was meant to have died already but somehow lived. Originally he followed him around invisible, but he started showing himself over time just because he found it funny to annoy Geno, now he rarely goes invisible when around Geno. 

He’s tried ways to kill Geno, even tried to kill him via death touch but the death touch didn’t work and Geno’s luck stopped him from dying other ways. 

-Has a giant slash mark on his torso. Providing he doesn’t move around too much it doesn’t tend to bleed too much. So tends to avoid any physical activities. No matter who tries to heal the wound it never goes. And no matter how much he tries to cover the wound it always shows. 

-To add to the point above, due to not being able to move around so much his movements are really stiff, and he never slouches not wanting to irritate the wound. The others may joke he moves like a robot but everyone knows why he does. 

-Was a scientist researching DT (Determination) when he got into an accident that took out one of his eyes and caused the slash on his torso. Using the DT he was able to keep on living instead of dusting. Though the eye and his chest look like they’re melting. Due to the DT glitches also formed on his body, though he isn’t bothered by them, he’s just happy that he’s alive, if being in this state could even class as being alive. 

-He’s always had the ‘cracks’ in his school since he was a baby. He just calls them cracks since it’s easier to explain than trying to explain how he could have them since he was a baby.

-His scarf normally drags on the floor, though sometimes he may use his tail to lift it off of the floor. Doesn’t like others touching it, the only one he’d let touch it is Error. When they were talking before the apocalypse Error used to hang onto it all the time when walking together, a way to stick with Geno without actually touching him. 

-He also tends to attach covers to the blades on his tail to make sure he doesn’t catch on something and slice it with the blades. Sometimes he forgets when he takes them off though and might accidentally hurt himself or others or damage objects.

-Gets headaches and chest pain often due to his wounds. So often spends time resting because of the pain. Though rest is hard for him due to the fact of Reaper always hanging around him. 

-Will try to get out of any jobs given to him that involve having to work with others, prefers to work on stuff alone. It’s mainly because he feels he doesn’t get along with most of the others, but never makes any effort to try get along with them either. 

-Often does things with Reaper, e.g. playing board games with him, has show Reaper video games as well, and tries to see how well Reaper can get at them. This started mainly because he wanted Reaper to shut up. 

-An overthinker, if given time to think about something he can and will overthink. Makes decisions best when under pressure of not having time to think about options. 

-Not a big fan of things being too quiet, drives him insane if things get too quiet. Often has music quietly playing in the background, normally lofi music since it tends to be softer than most music.

-Can be chatty when it’s a topic he’s interested in, any other time he tends to be more quiet. Though that still doesn’t stop him from getting into arguments with others.

-Tends to question a lot of things, wants to understand anything he can. Due to all these questions towards the others of him questioning them and their ideals and such he tends to get into arguments. 

-To add to the point above, if he’s gotten into an argument with someone he will back off and leave them alone for a week or so. Very few people he actually avoids. 

-Will hoard things he deems he needs in the future, only very few times he has actually used any of the items. Or given them to someone who needed something very specific. 

-Has glasses though he never wears them though, tends to only put them on for a minute if he needs to read something/see something more clearly. 

-Has slight difficulty walking, most likely needs a cane to help him, but refuses to ask someone to get him one. Reaper did try to give him one, but at the time it’s when Geno really despised Reaper so didn’t take it. 

-Tends to wear mostly white, despite his wounds/blood. Will not explain himself about it, since he has no idea why he does, other than he just likes how he looks in white.

How they feel about:

Nightmare: Night is one of those in the group that he tries to avoid when he can. He admits Night is nice enough. And he does want to know as much about the guardian of negativity as he can especially since not much is known about him. But he finds it quite hard to have a conversation with Night, due to Dust and Killer always being present. Night only really gives him the bare minimum of conversation, which annoys him leading him to be more abrupt with Night as well. He has a feeling Night feels (Geno) he doesn’t like (Night) him.

Dream: Gets along with them, knows Dream tries to cheer him up whenever they see each other. Also knows Dream doesn’t like the wounds on him especially the scar, so Geno tries to make jokes about the wound from time to time, trying to cheer Dream up about it trying not to let him worry. Geno is unsure if it works or not.

Cross: Is on okay terms with Cross. Though he doesn’t have much of an interest in getting to know him. When they do talk it’s normally on good terms, normally.

Blue: They don’t talk too much, Geno doesn’t really have an opinion of him. But does sort of get along with him.

Ink: Had a slight grudge against them when they first met. Since Ink had bluntly asked why he isn’t dead. But over time he let the grudge go, now both on slightly better terms with each other.

Dust: Being around Dust makes him uneasy, as he can’t work out what Dust is thinking or going to do. Doesn’t help that he can’t Dust’s face, he just cannot relate to Dust in anyway and that makes him super nervous around him.

Horror: They don’t interact much, or see each other that much. Haven’t really spoken to each other either.

Killer: Being around Killer makes him uneasy, can’t make heads or tails about how Killer thinks, knows Killer can be quite unpredictable, and doesn’t like that fact. Doesn’t help that Killer seems to have a staring problem when it comes to being around him.

Error: Is unsure on what happened or why they stopped talking really, just knows they slowly stopped talking after Fresh disappeared. Tries to talk to Error sometimes, but often feels too awkward to hold a convocation. He wants to talk about things, e.g. why they stopped talking but can’t seem to bring it up.

Lust: They don’t interact much, but most interactions with each other go smoothly. Geno wouldn’t mind getting to know them better, but he’s unsure on how to go about it when it comes to Lust since they’re so different from him.

Fell/Edge: When avoiding doing his job he tends to find where Fell is, cause there's a chance that Fell is also doing the same as him. They get along quite well and tend to have a bit to talk about.

Outer: They don’t talk too often, though when they do talk the talking can last of a few hours, since they’ll go back and forth talking about interests.

Sci: Helps out Sci when he has the energy too. They get along well, and both are very similar in terms of their interests and likes. So even when Geno isn’t helping Sci he might hang around him to talk.

Reaper/Death: ‘Hates’ him. But sort of gets along with him, due to the amount of time they’ve spent together. So tolerates him, he’d never admit that he enjoys his company now. Despite Reaper having tried killing him multiple times Reaper has also tried to be helpful for him in terms of trying not to see Geno suffer, e.g. trying to help him out with any pain or clean up any blood. Hates it whenever anyone questions him about why he has a reaper following him around.

Fresh: Hasn’t met him, well this version of him. Has tried to ask Error if he knows anything or heard anything of Fresh before or during the apocalypse. Error never answered him, just looked off to the side and told Geno to leave.

Gans/Echo: Only really sees him in the context of helping Sci out, or them having to work together on a project.

Chief: Chief helps him when needed e.g. if he’s in too much pain to do something Chief might step in if it’s something he can do. He makes sure Geno does work when he can, but also makes sure Geno won’t push himself.

[floofanflurr]

Twenty Questions for Fic Writers

Thank you for the tag @sneakyfox55! I don't normally do tag games, but this one looks really fun. (What author doesn't want the chance to ramble about their writing?) (This one is also copy/paste, so I'm less worried about clogging up people's dashes)

I'm going to put it under a cut since this is pretty long!

1. How many works do you have on AO3?

As of now? 9! (But I have more than 35 fics in progress in my drafts that aren't posted.)

2. What’s your total AO3 word count?

129,647! But like, triple that (or more) if you want to count unposted stuff.

3. What fandoms do you write for?

Undertale!

4. What are your top 5 fics by kudos?

1. Heart on the Table

2. How to Defeat a Human in 6 Easy Steps

3. faux pas

4. How to Comfort a Panicking Child

5. How to Help a Human in 2 Easy Steps

5. Do you respond to comments? Why or why not?

Yes!!! I love responding!!! I'm behind horribly right now because of my work's busy season, but I plan to catch back up! It's so fun to get to talk to people about the things I've poured my heart and soul into, you know? And I'm always glad to get to thank the people that took the time to leave a comment! It's a bit hard to keep up sometimes, though.

6. What is the fic you wrote with the angstiest ending?

"Is it Home Without You?" definitely. I'm still really proud of that fic, and it's part of a series with a happy ending, but the actual oneshot is the immediate aftermath of Gaster's lab accident from Sans's PoV. So, uh. Dead dad that no one but you remembers (not even your little brother) is pretty angsty. It's a step away from the norm for me, since normally I only write things with happy endings. But since this is part of a series that has a happy ending, I suppose my brain allowed me to end it off on a bittersweet (sad and angsty) note.

7. What’s the fic you wrote with the happiest ending?

This is really hard to say! I like big, happy endings, so most of my stuff gets them! Probably.... Hmmm. Either faux paus or How to Defeat a Human in 6 Easy Steps

8. Do you get hate on fics?

For the most part? No. (And I will always be grateful for the kind people that have picked me back up after I've been shot down in the past.)

9. Do you write smut? If so, what kind?

None you'll ever find under this username! I try to keep it family friendly here. ...Welllll, depending on if you count fics that tackle trauma and child murder in them family friendly.

10. Do you write crossovers? What’s the craziest one you’ve written?

I haven't written any cross fandom crossovers! ...I have, however, been guilty of writing cross fic crossovers (none posted). I like to make my characters from different fics interact with each other. I've also done some crossovers for fun with my friends, making our characters interact. All still Undertale fandom, though! The craziest one is probably "How to Adopt an Interdimensional Traveler" which may be posted at some point. It's a crossover between Heart on the Table, and my How To: series. What, you're telling me Papyrus has TWO children to deal with now? (Here, have the first little bit of that because I love it. And I love Papyrus.)

Step One: Find out their name “FRISK!” Papyrus’s voice was not a shriek. No. He was perfectly composed as he stared down at the… little Frisk in front of him.  The very little Frisk. There was a familiar thumping behind him as… his Frisk crashed down the stairs in their familiar clumsy way. For all the elegance they displayed in battle, that did not tend to follow them home. He partially whirled around to face them, keeping… mini Frisk in his sight at the same time.  “What’s up, Dad?” Mini Frisk made a small noise that may have been confusion as they rapidly looked between him and their larger counterpart. “…Dad?” Oh.  Hm.  Yes.  That was. A thing. Apparently Papyrus had two children now. 

11. Have you ever had a fic stolen?

Not that I know! And I sure hope not!

12. Have you ever had a fic translated?

Nope! That would be cool as heck, though!

13. Have you ever co-written a fic before?

None that are posted! But I like to write with my friends, sometimes.

14. What’s your all time favourite ship?

Surprisingly! Not Undertale! (Though I do like Alphyne!) Zukka! (Zuko x Sokka, Avatar the Last Airbender) I've loved that ship for years, and even though I'm not really in the AtLA fandom anymore, it still has a very close place in my heart.

15. What’s a WIP you want to finish but doubt you ever will?

Hmmmm. Again, nothing posted. I don't post fics unless they have a first draft completely written to prevent that kind of thing. (Though, I do rewrite stuff, and that can cause pretty big posting delays. But if for some reason I can't find the motivation to finish my rewrites, I could always just slap my first draft up so that it's not completely unfinished before I'd abandon it completely.) Of my fics not posted, though? I've got a fic called "Ghost of You" which is a fated soulmate dusttale!papyrusXreader fic. I hope I can finish it one day, but... well. I'm not sure if I will or not.

16. What are your writing strengths?

Characterization, and internal dialogue, I think! I like to think I'm pretty good at writing a character in such a way that even if you pick just a sentence at random, you know who's head you're in. Or, perhaps my strength is hurt/comfort in general...

17. What are your writing weaknesses?

It used to be dialogue, though I'm working to get better at that! I also struggle sometimes when it comes to making sure that the pace is engaging and that we aren't just stuck in someone's internal thoughts for 5 paragraphs. Gotta break that up with some stuff actually happening!

18. Thoughts on writing dialogue in another language in fic?

Very cool, and a great way to show characters that speak other languages than the one you are in the PoV of!

19. First fandom you wrote for?

Well... the fic itself is long gone, but! I wrote for Ouran Highschool Host Club when I was like 12.

20. Favourite fic you’ve written?

DON'T MAKE ME CHOOSE! HOW COULD YOU ASK ME TO CHOOSE BETWEEN MY CHILDREN? MY BABIES! ...Heart on the Table has a special place in my heart though.

No pressure tags (only if you want! this is just for fun!): @lizavet @timeofjuly @humankk and anyone that wants to!

Also... Shall I dare? invoke the potential wrath of a god(ess)?

I dare. I'm curious about the answers (if the goddess does deign to answer this mortal/jk) @llamagoddessofficial (please feel free to just ignore if you want!)

[deltaruminations]

little brother gaster is really funny to me in part because it implies a period of time in the skelebros’ history when sans and papyrus had to be responsible for a teenaged cryptid with a very loose concept of “science” or “reality” and a very strong commitment to endangering himself just to see what happens. this kid collects dangerously powerful lasers and tries to build particle cannons out of rusty scrap metal he salvages from the dump. every week or so they’ll hear a loud bang from his bedroom and when they go to check on him there’s always a 50-50 chance that he either just passed out on the floor from paint thinner fumes while customizing his gundams or he’s straight up caused some kind of small-scale explosion “by accident.” like if your Mad Scientist Dad or Adult Sibling commits scientific atrocities and/or yeets himself into the fourth dimension while studying the fundamental structure of the universe then that’s his problem but if your Mad Scientist Dependent Minor Brother puts holes in the floor of your new house because he believes an astral ghost spoke to him in his dreams and now he thinks he can scientifically prove that reality shifting is Real then that’s absolutely your problem

[sketch--booked]

I'm joining the fray when it comes to making a Sans. Its fun dammit and besides I think I'm keeping Ink alive or something.

This is V, Short for-- nothing really, Void ig but just call him V. He is an Out!Code.

More under the cut. +art

His creation was inspired by a dream I had some time ago about a Sans who was shattered across time and space in a similar way to Core Frisk, but retaining a lot more of himself in exchange for needing to stay in the Void more often than not.

His whole deal is that he knows very well that balance is vital in maintaining a flourishing Multiverse, and y'know, he lives there, so he'd like to keep it healthy (unlike himself with how little he takes care of himself (not like he can die probably?))

He's willing to do anything to ensure the balance between Creation, Destruction, Positivity, and Negativity remains consistent.

He'll show up to whoever is lacking and offer his services. Most times lending a creative ear to Ink (who promptly forgets him), spreading cheer with Dream or working for Nightmare temporarily. He's never met Error, but if Creation goes a bit far and he's lagging behind, then V'll just break things or put on a good chase for the guy to help him catch up.

His morality is not determined by action. He'll kill one day, then help an old lady with her shopping the next. He does have enough of a soul to understand empathy, but his sense of survival is stronger. He'll really only offer his services or take action if he needs to, knowing in most cases either the Stars or the Bad Sans' will correctly tip the scales.

He travels across universes through the Void, so if a universe is not connected to the Void, he cannot reach it. He also, because of this, cannot reach the Doodlesphere or the Anti-Void (and he's convinced being in there would instantly kill him anyway, so he's not eager to visit).

He tries to stay under the radar, but ultimately, because of one of his other "duties", he's earned himself the title of The Ferryman. He'll help deliver people from dead or dying universes to the Omega Timeline, and sometimes just take people in and out of Universes if they ask really nicely, like a reverse Charon, taking people from certain death and giving them a new chance at life.

His head is completely black and emanates darkness from the Void, being the place most damaged from nearly dying, which was an accident, and he doesn't blame his human for it, they were trying to save him by resetting, not knowing what it would do to him and so he holds no ill will towards any humans.

Because he lacks an entire head, he can't emote and remedies this by taking the faces of those he meets if he likes their look. His favourite is the one seen in the main ref, being the first one he stole and conveniently being Ink's face (he does not remember this). The creator easily made a new face, so no harm done, but others are not so lucky. These faces are a moment in time, and so do not move; he calls them masks. Wherever there is an open space, the void peeks through, and so he does not and cannot have lights in his eyes. He switches them out like this!

He comes from just a normal Undertale diversion, where he happened to meet the same fate as Gaster, Frisk reset as he died, trying to save him, only resulting in him being partially shattered. He was still forgotten, but he stuck together in the Void. This is why leaving the Void for too long takes a toll on him and why he has to return regularly to keep himself together, else he will fall apart and become just like Gaster (of which there are so many in the Void).

His movement in general is very stilted and doesn't use a lot of body language unless he's either making a point or being funny, because he IS still funny. He's mostly sarcastic but still loves puns and pranks (Don't put him in a room with Reaper, Epic or Fresh because they'd have a great time).

If you noticed the knives, he tries not to rely on magic since he partially blames his death on doing just that. He's more athletic than a classic Sans but still loves doing absolutely nothing and, for days on end, will sleep in the Void until he feels a disturbance. He can still use magic and has the same tricks a Classic would have, but now with custom Void-made daggers! (He totally stole the vibe from Killer.) He does not, however, have Karma, as he is no longer a judge.

Honestly, he's just kinda a guy. Not quite bad, not quite good. Mostly just doing whatever is needed at the time to keep living. He'll always be on whichever side is losing until balance is restored, but if it begins to tip the other way, then he's done too good of a job and switches until the Multiverse itself can deal with it. You can call him selfish, but in the end, it keeps the Multiverse safe.

And that's him. wahoo.

I'm also not spell-checking this any more than I already did sooo.

[darkbird-aus]

Splitswap AU explanation

Splitswap is a Swap AU, but glitched. It's the only AU of it's kind in the multiverse.

Janus is the Sans of this AU, or I guess was. He's not anymore.

He's the younger brother in this AU, Papyrus being the older brother and their father being Gaster

The AU became glitched at a particularly inconvenient time, when Gaster had brought Janus to work because Papyrus couldn't watch him. Janus wandered off while Gaster was distracted, wanting to explore. The Core malfunctioned at this time. A part of it blew up, Janus being caught in the blast. The Core was not supposed to malfunction that early on, thus the AU's code glitched. The code mistakenly identified Janus as an anomaly due to him being hit by the blast and threw him out of the AU. Unfortunately, the code did not do this cleanly. A piece of Janus' soul broke off and remained in the AU.

Janus was thrown into Traittale, where he was found by Trait and Traittale Papyrus. He was raised by the two and still lives with them. He still remembers his AU and is trying to figure out a way back home, which is not working. His soul was able to mostly heal, due to the accident happening when he was young.

In Splitswap, the code righted itself and found the piece of Janus' soul. It used this piece to form a new Sans (Split). It took awhile for Split to form, so he was missing for that time. Once he was formed, he was dumped in Snowdin, where he was found by Papyrus. Nobody in Splitswap is aware that Split isn't the original Sans.

The plot in Splitswap happened earlier than it should have due to the AU being glitched, so Chara (not Frisk cause Swap au) fell earlier. Split and Janus are the same age, Splitswap Paps is an adult. Gaster fell into the core shortly after Split was found.