#masterpost au

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Fusion!AU

Summary :

AU where Dings and Aster can fuse back into tol older Gaster

Details :

Dings and Aster can fuse to be Gaster

Just so they can get on those rides on theme parks.

Aster enjoy the thrill, but Dings can only take one or two ride before he collapse from motion sickness. despite being the one who hellbound trying to get on em

Useful when they want to get stuff in high places

sometimes they fused accidentally and just goes through the day as Gaster because why not

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Warfrost! AU

Summary :

AU made by @ennji-undertale​

The monsters break the barrier, got out, and into the war w/ humans again. Underground is filled with civilians but the core broke so its now ice hell in there.

Details :

Post Queen-Undyne neutral ending

very very bitter undyne, who is now queen 

barrier broken years and years after frisk leaves. 

they finally get 8 souls to break the barrier. after frisk left with basically all of them 

Barrier breaks and undyne declares war on humanity, war breaks out, shit goes to hell

during war, underground is used as a semi base of operations, but as undyne takes over an enitre goddamn city, they move out. 

underground becomes more of a distant homeland? its-- theres not many soldiers there. it--its basically abandoned

Since its been so long, core is breaking. its bad. 

Dings and Aster got pulled out of the Void with the remaining small amount of energy left in the Core

“You could’ve use that for the Underground” The Core machine broke man, even if they can, there’s no way to get the power to the rest of the Underground anyway.

Electricity pretty limited there probably but they got lots of alternatives for survival

Its also been ages, and flowey now has access to the outside world

and is kind of the undergrounds guard dog in a sense? he’s kinda anchored into the underground, but he can move around more freely than before

sentimental value, as well as tbh the barrier was not the only thing keeping flowey from leaving

probs something to do with the fact that they died here. Theyre kinda like a vampire in taht they need to be invited out??? 

and no one wants to fuckin invite the shitty flower out of the underground fuck that 

theres some weird voodo hoodo magic shit with souls happening here thats keeping flowey here

idk what, actually. 

its been years tho.

flowey has gathered more than a few human souls.

humans came here either for revenge, shelter, etc. Usually looking for monsters bcs of the war. 

and so flowey is in this half-asriel looking state with petals and leaves and its kinda gross.

therye kinda melty n glitchy and they have void eyes and they grin a lot and its just naaasty 

they want more souls. they remember begin whole once, when their frisk took a pacifist run. Its just fragments and dreams now, but they cling to the memory of being somewhat whole. 

they dont bother pretending anymore. They want you dead. they want your soul. 

Paps goes to war but Sans stays behind. Trying hard to make sure his last remaining family is not dead or thrown to void again. hopefully

papryus convinces undyne not to bring sans and aster/dings into the war. 

papryus is kinda the only thing keeping undyne morally straight right now

i think alphys is dead? tbh? 

Without the barrier and the core, hotland is now cold, waterfall is now fucking frozen, and snowdin is in constant state of blizzard

mt. ebott is fuckign tall. the only thing keeping the cold out was the hotland magma and magic circulation via core, and the barrier. 

none of that is here now. Everything is frozen. 

Alphys probs didnt die right away, and so theres now a shitton of amagamates. in attempts to bring back people. 

there like cursed remnants of their past tbh

the souls were lost n a lot of monsters fell down with the loss of hope

results n shittons of amalgamates as alphys tries to keep them together

they wander snowdin’s blizzards alot, also fuckign. Theres just alot of them.

Grillby runs a shelter in snowdin

grillby’s magic is basically the only thing keeping the residents of snowdin from freezing

theres a buncha war veterans who cant fight anymore there n stuff

its not pretty, but they get by

grillby patrolls snowdin to find stragglers n bring em in to the warmth before they freeze

thank fuck grillby’s good at magic and cold resistant like srsly

Dings and Aster try to fix em core and try to fix the timeline back?

POSSIBLY turns back time or sth and fix the timeline so the Core won’t break and Underground won’t become the ice hell it is now

they might get thrown back to the void but eh.. better than this alternative

possibly the only time dings and aster willingly goes back to the void

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Baby!AU

Summary :

Dings and Aster got out from void but in baby size. So Sans and everyone else got one really loud baby and one really grumpy baby.

Details :

AU where they didnt collect enough magic/dusts to create a full smol monster so Dings and Aster ends up in baby size Now everyone got a loud baby (Aster likes people and attention so they would get antsy when alone) and one grumpy but also teleporting baby (good luck finding Dings when he teleports away lol)

Aster is a freakin banshee his scream is amazing

Dings probs finally learn how to speak english better when he grows up but still mix it up w/ wingdings accent

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Corrupt!Chara

Summary :

:3c

Details :

Chara dies and got stuck inside the reset screen. They stuck in that unreachable void no one else can get to... not even Frisk.

(well they're not really stuck, but if they reset everything goes to shit so they don’t want to)

They ends up gong insane from the isolation and goes on full murder mode in the end and gets out and wreck havoc everywhere.

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Corrupt!Aster

Summary :

The full summary we put on the notebook about this AU and basically everything is horrible

[Novocaine - Fall Out Boys] in case you need how horrible this song is

((i mean the song is good just the lyric is so bad it fits well to this mess))

Details :

Corrupt!Aster is AU that starts off the same as C!Dings, except Dings also accidentally drags Aster into the Void the second time w/ him

Aster HATES the Void so much because isolation does not mix well with his anxiety. Esp not after he just got out and can finally talk to other people and also his family and its all gone again. Being in this state made him catches the glitch even earlier and faster than before and how he got corrupted incredibly bad

Dings doesn’t get corrupted that easily but BOI the guilt that builts up is so bad! Everytime Aster going even more corrupted, Dings losing his hope little by little to actually like... get out with Aster... if there’s still Aster left in there

Aster here, whenever he lose himself to the corruption, he would turned into a big void skeleton monster and go on rampage, unleashing attacks and all.

C!Aster would also be super manipulative? Whether they realized it or not. Aster is really REALLY scared to be left alone in the Void.. or just.. alone in general. So Dings is the only one around that he can latch to. Making sure he won’t ever leave him alone. Despite turning into his corrupted version a lot, C!Aster would make sure Dings sticks close to him no matter what

dear fuck this AU is awful I hate why are we like this man??

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Doki Doki! Literature Club AU

Summary :

All the corrupt! versions (C!Dings, C!Chara, C!Frisk, C!Aster) somehow ends up in the same void and Corrupt!Chara take it upon them to make up a world for them to settle without stressing them out and lessen the corruption.

Until they realized they are in a dating sim game and the protag is here to ruin everything

Details :

Okay not intentionally ruin everything but still

All the corrupted characters always goes up and fight each other whenever the corruption rises and things are awful

C!Chara noticed that the corruption tied strongly to their emotion so C!Chara sets em up to another game/world setting where they can..technically lived normally without dealing the stress and isolation in the Void. The game they picked up is apparently a dating sims game.

C!Chara puts em up in where the girls would be : Aster as Yuri, Dings as Sayori, Frisk as Natsuki, and Chara themself as Monika, where they can took control as the admin of the world

Dings is Sayori so the protagonist’s childhood friend, and practically the one that keeps everyone in check.. in a way. Dings keeps Frisk in check by.. probably fighting / arguing with them a lot? It keeps Frisk from getting their violent tendencies to the other or sth like that? And he make sure Aster takes good care of himself and stuff. Dings and Chara is generally good pal so yeah?

Aster is Yuri so he acts like.. well regular nice and calm Aster~

Frisk is Natsuki except they are 2x more likely to fight you because they can.. probably not bring cookie but idk?.. tbh Frisk would just waves those ilegal manga like hey bro bro ya wanna read some manga i got them good ones and its totally allowed in clubroom join us

Chara is Monika but still a pretty chill dude? Monika has somekind of strict aura coz she’s the president but Chara more like ehh ok you can join the club, or not, please don’t.

The Protagonist of course would enter the world at some point and it throw a wrench on the whole “safe and normal” settings chara has been trying to keep. Because, being a dating sim, the protag would definitely go for romance and love... and none of the characters are ready for that kind of emotion yet lol

So first part of the game goes normally like how DDLC goes, they all join the same club, get together, read poem, yada yada yada romance. Except here Chara is trying so hard to keep you from romancing the other characters.. like.. at all. But being a player on a dating sims, they gonna try anyway.. which will go the same way as DDLC goes, and ends the first part w/ Dings’ death

Second part starts and it goes normally except Chara is now even MORE determined to not have you there. (So I guess either the others invite you or you were checking clubs and stumble the one here and got caught in Frisk offer for free manga read) And during the glitched part, Chara would ALSO starts to glitch because of the stress and will start blaming you like “What have you done!?” “What part of DON’T GET TOO CLOSE TO EVERYONE DO YOU NOT UNDERSTAND???!!”

the thing about Aster is that when he’s corrupted he is incredibly manipulative on keeping people to stay with him and very possesive too

Like Yuri lol

Aster would redirect you into going through his route no matter what

but unlike Yuri he would still look as calm and polite as he always is

Until that last bit

And also probably do that suicide thing Yuri does

I forgot what Frisk would do here but Frisk and Aster fight would not be pretty it would be incredibly awful and Aster would be the first to throw the awful degrading words first which is.. ya know.. incredibly out of character but dang he would

By the end of this part, depending on whether or not you heed Chara’s warning or not, they going to react to it and it will affect their involvement in the next part

If you heed their warning and not actively going through the romantic route, they would settle down and explains things as they are. And how you can possibly help them fix things up in the next run (because the stone has rolled on this one you have to restart regardless)

If you still stubbornly try to romance everyone or exhaust their glitchness to the fullest, Chara would just throw the towel and say FUCK IT YOU WANT TO MESS UP EVERYBODY SO BAD?! BE MY FUCKING GUEST YOU ASSHAT! And just... leave you alone through the new part

Third part the game would glitched so bad you end up in another game intirely. A murder mystery game. Your childhood friend has been missing for a long while and no one have any clue to their where about. Until you suddenly saw them on your way to school. You try to stop them but before you can get to them they were  gone.. again. You go back on your track and go to school.

There, Chara invites you to the Literature Club, only to stop you halfway to the clubroom, and depend on the result you get on the last one, Chara would either inform you about how to makes things better for the other (as in genuinely just going through friend route and not try to romance anyone please) or just “Have fun you asshole” and leave you alone in the clubroom filled with... Frisk, Aster and... Dings!

You tried to talk to Dings like where have you been what happened to you and Dings just look at you like you’re the dramatic one. “I know we’re not on the same class and club but jeez chill! I’ve always been on the club after school, guess that’s why we never catched up to each other.” And just.. goes on normally. The club goes as it is with everyone introduce themself and you get home with the poem homework

The next day you come to school and there’s rumors that some students are suddenly missing too. You’re not sure how to process the whole thing and you determined to figure out the truth from Dings, being one of the student who disappeared and just.. back again suddenly. Dings keep dodging the questions and thinks you are the paranoid one. Poem exchange time and you realized everyone’s poem are cryptic as hell. Like a puzzle of time and places but you can’t pinpoint what... yet. You go home for the day

Another day goes and out of curiosity, you try to ask around to Aster and Frisk’s classmates (you know they are on the same grade and upperclass) and you find out... they both also have disappeared for a while. You ask to Dings’ classmate and they answered no, Dings has not, in fact, been to class since... months ago. Despite him always constantly in the clubroom. Another student also missing too today, one of your classmate. You decide to approached all of them about this

Everyone thinks you are crazy and also reads too much of that mystery novel Aster gave you. Poem exchange time. Another time and place puzzle, this time you realized there’s also people appreance description there, that... strangely fits so well with your missing classmate! If you choose Chara last (and also Chara helping you in this route), they would invite you to walk home together. If you choose Chara first, they would ask you to “keep a close eye on the poems, you might find some hidden symbolism in it”. you go home together regardless, and Chara pulls you aside and ask if you figure out the clues yet. You both them put the puzzle pieces together and follows the directions. You find out where your classmate are. Dead. You called the police and ambulance and they go to the scene and question you for information. Chara answers most of the questions to make sure they won’t go to suspect you nor everyone in the club... yet.

this goes so long holy shit

fuck uh

Revelation moment, turns out Dings, Aster, AND Frisk are the ones behind the students disapperance and Frisk is the head of the operation. Later on finds out that Dings and Aster are actually ghosts who’s gone crazy and winds up killing people. even later on you finds out that Frisk was actually the one who killed them in the first place but they couldn’t remember Frisk’s face so they just go around in rampage

sth sth epilogue they all settle down and finally found peace?? Dings and Aster calmed down and Frisk... uh.... i guess the same idk

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Masterpost AU

While looking though my new followers blog I find that you put my blog in a masterpost you created, that is so sweet of you, now I have to show my appreciation by flooding your inbox with sweet messages