Undertale AU Ideas Wiki
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AkaruiTale[]

AkaruiTale: This AU starts like the beginning of the game but with one alternate Chara who did a genocide when they fell. It all began on a genocide run made by Chara... before even Frisk fell down. Chara in the OG timeline started killing everyone, starting with Asriel, then last Gaster. But with that, they awakened the demon. At first, they didn’t see it, but they got in contact and saw what the dark demon wanted. But he was too fast and slowly took them out and reset the world and story to the new one, starting the events of AkaruiTale.

Story: This story started after the monsters were sealed away underground, and the king asked Gaster to look for a way out. Days after, Chara fell down and was adopted by the king and queen. Asgore asked Gaster to stop his work and live with this human. Gaster, in rage, went to his lab to think, and he remembered he had read a book about a dark demon and summoned him to work for a way out. He and the dark demon had an idea to win Chara’s trust: Ask him to babysit Papyrus, give him food, and throw a party for him. While he secretly experimented on him until he had a dark idea—a bad idea. He took a bit of determination from Chara and made it into a pill, giving it to Sans, his own son, because he found out a little about Gaster and his dark friend. One day, when Sans found out fully what Gaster had been doing, it pushed him into the Core. But he didn’t realize this was part of his plan to fuse with the dark demon to become Dark Gasmon. Everyone forgot about him. For his part, he whispered to Chara for the plan of going to the surface and getting human souls. So they did, just like in Undertale. It ended with them dying on some black petunia flowers. The king and queen were depressed and still trying to find a way to get out, and Asgore asked Alphys to find a way until she came across the same book Gaster had read before. So she gave it a try... Nothing happened until Gasmon had her under his control and declared the same role of killing humans. But this time, he spread darkness all over the Underground, with only a few who weren’t affected—the good-hearted. Toriel saw what her husband had become, ran to the Ruins, and planned a revolution when a human fell with some monsters on her side. When Frisk falls to the Underground is when the story begins to save everyone in the Underground from the darkness and go to the surface.

Charaters

Frisk:male (yes frisk is a guy in my au,it my au so I can make whatever I want but his pronouns are him/they but prefer male) 10 years old, 7 human soul that fell.Related to soul of kindness his brother Jalen His star necklace and glowing determination you save them from the darkness bring them into the light or killing them and absorbing there dark and turning you into the real monster of the story there is many different route in this dark underground.

Plowey the black petunia: nice but sacred so he betray you in the end with asgore no matter what run you do.

Naps: unlike his cousin he more nicer and sad, doesn't understand what happens but try at least when you first meet him, he lil sad dj boy, at time visit metta but he so busy he just alone, making music and remix until he meet you make music together if you do the right path tho lol, he runs a snail farm he give some to toriel, dose lil show in the ruins for everyone and will stop metta from killing you say your good and your not there killer. Tell frisk there were human once but now a monster at least that they make him happy, outside and inside.


Genocide naps:

Toriel: female (she goat mom, the ex queen of the underground with a pure golden heart it the few monster not effective by the darkness) she lost both of both her children and regrets it and still live that memory in her mind.

She make like doing the what a mother do, she usually make chocolate marshmallow pies chara favorite, she confused frisk at first but realise it not him but sacred to let them go but have to she has a feel he can save everyone even in genocide, she lost hope but can still take care of a child. She will still call you to see if you need help or your sacred. She have new hope by yourself alone. Don't let her down.

sans: male (short but older of the skelebros, he work with gaster and experiment on him with, training him) do hang out with chara and asreil after they died after gaster fell he only remember pieces of him including chara when he visit until his plan.

He an asshole but a good asshole (not like fell sans) his pun are usually rips on people make fun of them, first meeting the human he ask to shake his hand until it drops but it was a prank of "loss an hand joke" it always funny. He hand out in grillbys bar, to drink ranch, is lazy like always but have chilly dog stand all over the underground.

You will fight him to for the fun and lol. Plus undyne will yell at him If he doesn't at least fight against you expecly alphys. Has a pet pebble with googly eye. Ps those are not eyelashes there his darkness coming out.

Genocide sans:

Kansu:

grillby: male(his flaim color is dark blue and Purple) he owns his own bar that sell beer, food and drugs in the back at night is adult night with his own club in the basement.

Sans has it own tap at his bar and usually get drunk on ranch and modelo negra. He always willing to take him home, at time he give sans drugs to or weed.

He also the evacuation leader in cast of genocide and will fight you if you bump into him hotlands.

Genocide grillby:

Papyrus: male(the youngest but tallest of the skelebros) lil brother to sans and Chara. Bff with plowey and asreil. Also not effective by the darkness since he was to innocent and gold heart he wasn't effective at all.

The magical papyrus like to draw and make plan to trap or befriend the human whatever comes first, he will date the human not force but ask first if they want to hang out at grillbys/watch mtt/ show him his game, hobbies and plans/drawing. He will make lasagne for everyone, even if there rude but he happy to help anyone include the human like toriel he will call at lot if he need help or want advice.

He even has his own comic hero persona called starbones he make comic and do hero dutys, he get more comfortable and more convinced in the suit. Like undyne.

Some genocide routes he will first start like the og run but will block and fight frisk, but later get harder some sans will join in the fight, he also dress as starbones to stop you and some sans can take the blow to be disfaith au and be extra hard for you over time papy just a sweet heart trying his best for everyone

Starbones:

Disfaith:

human sans and papyrus: Nothing much to talk about besides they can swap to monster and human but can't use determination the reason there a hybrid or can swap because gastor parents were young human and monsters in love.

Monster kid:

Genocide mk:

Red(blood):

Undyne: she doesn't remember her parents but when she was small they fought in the great monster war, in the end she doesn't know what happened to her parents bit gerson took care of her until Asgore and toriel adopted her fighter with gerson and monster kid later, but while she was growing learned,train and teach how be warrior and a princess same as Chara and Asriel until they die and toriel ran away but she stay with him,even when the whole darkness took over th underground and more as a knight,while fight her eye was tookin out play with papy but she was brave and inspired papyrus want to be part of the Royal guard of course, she doesn't wear a eye patch for her eye to be more scary lol, she know papy strong and brave but she at least train him and teach him how to cook lasagne and many dish plus music, he to pure for the world and the darkness so she usually shield him and Sans take the job as judge for undye, when she meets frisk it like the usually game, but she has heat vision so be hard to hide both water and grass but she will befriend you if you take the right path and help you in the way to Asgore listening to papyrus advice for once lol and monster kid will step in when it to late in hot land or distract his big sister until she does fell down, until you give her water lol.

undyne the soulless:

Alphys:

Alphys neo:

Killy dew mew:

Metta: when he first sees you he well think, you look like the person who killed them well son and throw them down below, at first he will toy with you, but more dangerous and destructive, yes he will let alphys play her game still, but make it much harder for you and alphys at the end he will send the whole core and hotland down for you with a wanted poster like a wanted criminal, until you reach to this show where the big guns be take out until you switch his switch. His beta body floats/with screan for a face and some energy line on top with a broken one pumping gas out.

Mettaton ex.a: the famous robot build by the smart but dorky alphys, to impress Asgore and it work even tho, the little pink ghost was once a human but don't remember his and both his brother/cousins story just memories only know they were murder and in the underground as a ghost with his brother and cousins but that a story for another time. He always has a dream to be a star and a killing machine for humans even tho ghost can't become dark he want revenge still on who wrong them, he runs his own hotel/restaurant/many tv shows, power by darkness still and energy from alphys accidents with a few hands to chock you down trying to get your soul to yes break them all out and take down the person who killed them and show the human who the real famous person, he will try to take the spot light from you if your take it to much your against a killer attention hungery robot from a 10 year old.

Mettaton neo.a:

Muffet: she the queen of all spider after eating her dear bf of course, with her spidercake baby she run her side of hotland won't let anyone steal from the queen of the spider ms. Muffet with her back claws she more dangerous and her poison of course both mercy or fight route she very aggressive but if you were nice to the spider she let you go with a free treat and a sorry for trying to eat you but if you did accident kill one her baby she won't be that happy will fight you but in the end she let it side for now hehe.

She makes a bombass desserts papy like her cooking with her tea of course. She has a friendly with they with they not with grillby bar who knows at least she can't eat her husband this time lol. Alphys is scared of her, and Metta try always try to give her money for a Metta cupcake. She denieds it but maybe one day hehe

Genocide Muffet:

Asgore:

Genocide asgore:

Omega plowey:

Asriel dreamer:

Asriel: the son of Asgore and toriel including the prince of underground that everyone love the sweet pink goat sunshine boy, with his adopted brother Chara that fell also a prince including his big sister undyne/princess and warrior also the Skeleton brothers including to this werid family tree with uncle Gaster. Always love hanging out with Chara, coloring, playing and being a cool brother like part of his family until that day when the plan came to true.... At least in the end you can save him and Chara from death splitting both plowey and Asriel as different body's and give them a happy ending at least both Chara and Asriel have matching ribbons and necklaces.

Chara:he a male (yes he also a guy but chara is trans so gose by he/she so no fighting now) age 10 and still in death

The reason why the whole world got infected by darkness by the dark demon by his fell into the underground doing a genocide but reset everything with a new history like the og but with changes.

Love chocolate still, brother to asriel and papy before he died he babysitting the skeleton bros and was a big bro to papy like another brother will sans and W. D. G were working.

He never wanted to died or the plan at all but the dark demon with gaster trick him and made him for it but failed like the same story.

Gaster & the dark demon: Gaster a good father to papy and sans, great uncle to Asriel, Chara even tho he was human and later undyne also well good son to his dead father that didn't tell him his mother was a human explains why he can switch to a human form but something changed inside of him, his emotion after all stress, and training sans to much to the point of breaking and a young alphys to scared to watch yet traumatized by Everything, that he snap falling into his own work into the core but fusion with the demon putting that dark idea in Chara mind his new experience.

The dark demon an old accident demon that changed the old undertale game into reality and shaping into a world of pure dark but light, tricking Gaster into fusion with him and then Chara for the plan, finally to Asgore after all that happened to infect the whole underground with darkness until there be a least one light of hope to stop it all.

Dark gaster:

Dark demon true form:

Human sans & papyrus: Nothing much to talk about besides they can swap to monster and human but can't use determination

the reason there a hybrid or can swap because gastor parents were young human and monsters

in love.

Supernova Novie: he live in waterfall since it feels like he seeing stars like home even tho he doesn't remember but feel like it, he a boy from the stars, even tho he looks human but he a monster tho Asgore try to kill him but didn't since Toriel went from hiding to stop him to protect him and ran back to ruins with him but he still wanted in Asgore eyes and the underground, he friends with naps he dose get lil annoyed how Metta left his cousin behind after what naps told him about there backstory even tho he like alphys and watch anime together when she not to busy, he likes Muffet baking and help hers out a lot of she doesn't try make him I to a cake hehe but hangs with papyrus a lot with undye even tho undyne is command to get him,she let him go but they play cat and mouse when they have to lol and has to handle sans personal jokes but he at least enjoy them even tho dose get on his nervous but tho he dose go with grillby for milk but dose get ask for his id and Torie when she needs help on something for pie, you will bump into them it be different with other routes.

Nice route if your nice and make him out of a moody mood will show his art/writing and his backstory that he reminds where he fell from the sky where naps found him and everything that happens why he wanted in the underground and he will show him and naps music they made to go against Metta and papyrus cooking they both did that day. That claim him down plus his scars lol.

Normal routine it the same but won't show his backstory or any other thing if you are lil Mean or don't help him claim down.

No mercy that a hell death wish because get him so annoyed that you kill half his friends even tho some want him dead but hell go supernova on yo murder ass to almost exploding to kill you....

He moody but get to know him more and claim him down in any route you do he becomes more of a nice shy boy long the way.

Sabor: when grow up he always been pick on being weak since he has no claws and just soft paws, get scars and he got enough so one day he meet nova the wanted human monster but he be friend him more like his rival in a way, have fun, do pranks and being little evil dude. He still felt weak until he overhread a talk with undnye will she walk out of papyrus house, on a call with Dr alphys in hotland. So he ask for a request and she accepted it and made him some claws power by gas now he can stand against himself and his rival for fun

Normal path he give you a lil bite but that all

In good path he will past you, join him in battle against papyrus and nova. Some hang out with papyrus. Doesn’t like undye will bump head at time but respect her in a way

Can grow to the size of an elephant Regular size is the same size as any other tiger for the more meaner route and he really aggressive exceptly when you killed papyrus since he did like him as a friend since he help him and stick up to him

Loki: he both genders in a way for the private parts, this version he is an eevee but umbreon, he located in hotland rivals grillby club/bar and Muffet bakery. In this own club that he also preforms against Mettas own shows, your not old enough to enter since is a only adults but he dose sell item for you,  poster, clothes, food and sign merch including his info and backstory's in different routes if you want to join his team fan club but can't enter if your older tho.

Good routes if your nice and help his relationship with novie he be happy and be friends you as a friend....

Normal if you were kind of rude/mean or meh he won't ask for help or advice he just shrug you off.

Genocide is another story since he will full on kill you on struck not let you buy anything and hear you kill novie hell go crazy that he couldn't protect an angel against a devil like you...

Intro: Long ago even before the war of human and monster in this land was once a tribe...

A tribe that worship a dark demon from the shadows write on the walls of this every mountain but no one know what happened to then they all banish....

A young human and monster were sneaking out for there forbid love until the young monster saw the writing he was moved in by the words....

He stay there writing, learning,and reading.

He saved his logs in book...

Year later they had a child name gastor

He gave his son his finding and told him to continue until the war broke out.

Humans and monster. They killed his parents in the war and spelled them away.

Year later asgore ask gastor to find a way to free them. So he did finding the book his dad gave him and stating his new experiment....

They say if you climb the mountain you will be take by the shadow and the first human fell down....

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