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Your bad nightmare

Reads 3,059
Votes 79
Parts 8
Time 16m

Reads 3,059
Votes 79
Parts 8
Time 16m

action chara death fanfiction flowey friendship frisk goodchara papyrus platoniccharisk possession sans sansandfloweyfusion underground undertale whydopeoplewantmore

SANS HAS BEEN POSSESSED BY FLOWEY!!!!!!!!!!!! 
With their remarkable power they're able to take away Frisk's ability to reset.
Flowey, in total control over the fusion, shows no signs of his motive, or what he wants.
Frisk tries to fight back, they've lost everything, and are not ready to take them on.
But they, one day, find thousands of piles of ashes, they've been killing this whole time and they didn't see it.
Will they be able to free every monster in the underground, not to the surface, but from Flowey? Read your bad nightmare to find out.All Rights Reserved

action chara death fanfiction flowey friendship frisk goodchara papyrus platoniccharisk possession sans sansandfloweyfusion underground undertale whydopeoplewantmore

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Undertale Determination by StorageLibrary

Casted out by their village and fallen into the depths of the Underground, Frisk has to get quickly used to the fact that they not only have to survive against monsters, but also have to figure out who that Ghost Chara is, that helps them through the darkness of the unfamiliar world... WARNING: PUNS AND JOKES AHEAD!! AND SOME VIOLENCE, cause this is Undertale! If you hated Sans puns, you will hate this story even more. And yes dear readers, your soul will be in shambles. GET IT?? Cause with determination it splits apart! Haha...hah...

Red Eyes [Chara X Reader] by CouldYouJust

This story is inspired by many other works and may bear some resemblance in certain places. However, I will endeavor to make this story it's own. 2 years ago monsters were released from the underground, ending their centuries-long imprisonment at the hands of ancient humans. Not a soul remains in the underground. But that doesn't mean no one's there. Be it chance or fate, The First Fallen will soon meet an all too curious human as he ventures into the deep beneath. The Reader or [Y/n] is male and Chara is female. I apologize if this bothers you it's just how I've always seen the character. Disclaimer: I don't own these Chara-cters nor do I own Undertale. This is just for fun. This story's rating is [M] for explicit language, violence, suggestive or sexual themes, and fantasy/fictional violence. My lovely reader @NightTheDemon1 told me that the artist of the cover is a Twitter user known as @A___IRAA. Thank you!

Fonttale by MegynHamilton

Fonttale is an AU where skeletons have a special power related to their font name. A Normal Font Comic Sans for example, can force people to laugh. However, Papyrus is a Horror Font and they're much different from Normal Fonts. This is where and why the story begins. Papyrus is a sadistic murder whose main goal is to protect his one HP brother Sans. By day he pretends to be an obnoxious idiotic skeleton obsessed with puzzles and spaghetti, but at night he teams up with Flowey and patrols the area for humans in order to collect souls to break the barrier. When he isn't doing that he visits the MTT Resort where his brother does his comedic acts and kills monsters he finds in the alley in order to keep Sans safe. Unfortunately as time passes and more and more monsters disappear, the "Resort Killer" becomes everyone's favorite topic...including Undyne's. When Papyrus decides one day to take a chance, something goes wrong and Sans discovers more than he ever wanted to about Papyrus, the Underground, and even himself. The line between right and wrong becomes a blur, and his relationship with his brother is tested as he tries to help him overcome his apparent madness. But is it really Papyrus that needs help?

Chainsmoker [ Gaster!Sans x Reader ] by morrow-

Routine. The entirety of every living thing is dominated by it, human or monster. Everything HAS to be the same. It was in this that you were the exception. For you everything was new, every time line a detailed altered in order to satisfy your sadistic desire for a new ending, whether it be only a few details of dialogue altered or something else entirely. Monsters you once considered family you now butcher and slaughter without a second thought, after all, that's what the Reset is there for, right? And all at once it stops. Your small hold over the Underground is ripped away from you and you are thrown into a dying timeline, monsterkind's final attempt at self-preservation. You're alone, completely and utterly alone. Except one. And he has a bone to pick with you.

Little Things - Sans x Frisk by DragonzRawesomE

{COMPLETED} When Frisk climbed Mt. Ebott, she had expected to simply be erased from existence. But instead, she awoke Underground, and found herself in the hands of creatures she had never imagined in her wildest dreams. She begins on her journey through the Underground, coming across some unexpected new friends along the way. One friend, in particular, is there to guide her along the entire way. But when her mind is enveloped in a prison of darkness and her Determination seems to have disappeared, will she be able to pull through just in time, with him by her side? Or will she fade from existence, just as the seven humans before her? DISCLAIMER: UNDERTALE is owned by Toby Fox. COVER IMAGE edited by me. I do not own the original image. PLOT/STORYLINE belongs to me. The events in this story are not canon and are simply for the entertainment of myself and my readers. Please do not steal. Thanks!!

Changing The Game by Starlessz

One month before Frisk falls into the Underground a different human falls, someone that is not from this world, but from ours, and now they have the power to change the world as they please. What will they do, will they do the genocide route and become a megalomaniac? Nope, they want to be everyone's friend and get their version of a perfect ending.

Under Infusion Tale- (An Undertale Fanfiction Novel) by Serena_Walken

(Complete) Monsters may be free, but there is a high price to pay for the one that freed them. Deciding Frisk is better off being a mystery, the monsters leave it alone for 14 years. Until Frisk is discovered. Undyne and Sans try to reach her in time, but she is left with a fatal wound. With even boss monsters unable to heal her, Sans heals her the only way left. However, that was part of Gaster's plan . . . but Flowey was not. The result is wedding bells ringing twice for Frisk. Once to Asriel . . . and once to Sans? *Frisk and Sans eventually.

Undertale:Secrets by ItIsComic

Remaster on my page - check it out! Sans has had an interesting past. A past that even his beloved brother barely even knows of. A past that he wishes could remain a secret. But when the questions start being asked, what does he do? These questions seem so little, yet they cause so much to happen. One little question. "Who is ??????" can change so much. A chain reaction from a single sentence can cause an entire world to crumble. Or maybe two. This is my first book so dont expect anything great. Inspirations: The "Better Times" trilogy by: @ANinnyMouse42 "Royal Blue" by: @dealialestine Started: 24th May 2021 Finished: 29th December 2021 A full 7 months of great fun with this book! Cover art by someone? I couldn't find the original owner :( Undertale by Toby Fox

Determined to Stand by Luna-Moon-201

After 3 years after Frisk flee the monsters from the Underground. She lives happily up on the surface with her new family of monsters. Well with Toriel, Asgore, Undyne, Alphys, and Flowey left to Washington D.C to meet the president. Sans and Papyrus are left to watch Frisk till Toriel returns home. Chara has plans to take control of Frisk. He wants her soul and to Reset the world again. There is however another person whom lurks beneath the shadows that Sans and Papyrus kept secret from Frisk. Now it's all going to be reveal. So many mystery to solve and secrets to uncrack. Frisk will soon have to face her fears and overcome Chara's evil plans. With the help of old and new friends. Note: Frisk is a female in the story and Chara is a male.

UnderAsriel by FatalityWanes

Chara has one objective: RESET back to when they themself fell, and save Asriel from his demise. With all the Genocide Runs the now-free Frisk goes on for them, they're able to amass a big enough collection of SOULs to do exactly that. The only problem is, Asriel remembers everything that happened when he was Flowey. And he isn't too happy about it... In this new timeline, Kelsa, the SOUL of Bravery, falls into the Underground shortly after Frisk. Determined to save her only friend, Kel teams up with a mysterious flower with a face to find them and rescue them from Asriel's notorious freezing chambers. Betrayed by many, and uncertain who to trust, Kel finds herself in the midst of an iron-fist dictatorship, fighting to restore the Underground to the peaceful place it used to be. But... all is not as it seems, and there may be things about Frisk that Kel will wish she'd never discovered... Cover art by yours truly :3 This story takes place after the events of Underhappened. You may wish to read that first if you haven't already :D

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Slide 1 of 10

Undertale Determination cover

Red Eyes [Chara X Reader] cover

Chainsmoker [ Gaster!Sans x Reader ] cover

Little Things - Sans x Frisk cover

Changing The Game cover

Under Infusion Tale- (An Undertale Fanfiction Novel) cover

Undertale:Secrets cover

Determined to Stand cover

UnderAsriel cover

Undertale Determination

Casted out by their village and fallen into the depths of the Underground, Frisk has to get quickly used to the fact that they not only have to survive against monsters, but also have to figure out who that Ghost Chara is, that helps them through the darkness of the unfamiliar world... WARNING: PUNS AND JOKES AHEAD!! AND SOME VIOLENCE, cause this is Undertale! If you hated Sans puns, you will hate this story even more. And yes dear readers, your soul will be in shambles. GET IT?? Cause with determination it splits apart! Haha...hah...