BEST Undertale AU stories
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(Being rewritten! Look at the last chapter!) Reborn as Crescent door StellarTales999
StellarTales999
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Someone from our world died and is reborn as Crescent.
Red Flowers door Empanadont
Empanadont
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In which Error has Hanahaki and Sci becomes a love doctor.
Growing Up     [✔] door Mondi06
Mondi06
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(Finished! :3) Heya! This is my first book, but I hope you enjoy. This isn't Fgod, by the way it's my own creation. CM!Error, or should I say... Childmind!Error? Ahem! Error is a cute little bean, living in the Anti-Void. He occasionally destroyes AU's, but that's it. Not really exciting, right? Well, his nemesis, named Skittles Art Supply McNobodylikesyou Ink, (actually is just Ink-) beats this cute little bean up on daily basis. If he don't, somebody else does. Who is that? I don't know. Or do I? Errors life changes drastically when he kidnappes Underswap!Sans in his Anti-Void. What will happen? Find out! |Triggerwarnings. More about it in the A/N| Cover by me uwu. Its bad, I know, but its a cover. Error, Geno and Fresh belongs to Theloverofpiggies, also known as CQ. Ink belongs to Comyet Underswap belongs to p0pcornpr1nce (I... think?)
Dysfunction to Refunction door BlindBones
BlindBones
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Balance was tipping in the Star Sanses' favor and Nightmare can't keep up. He needs to make his own group to balance out the multiverse. Is recruiting the Bad Sanses really about balance, though? Or because of something else...? Cover by me No beta, we die like men #1 in balance
CRIMINAL AMNESIAC door MissUnpopularOpinion
MissUnpopularOpinion
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When Dream loses his memories after receiving severe head trauma in battle, Nightmare and his team choose to take advantage of the situation...
Bad Guys Ask/Dare door JustTommy_lmao
JustTommy_lmao
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Okay, I'm not English so there may be mistakes. • • • • • {Nightmare, Killer, Horror, Dust, Error, Cross}
Color door HeartsAndMusics1Ham8
HeartsAndMusics1Ham8
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"I didn't mean to have a favorite color, until he yelled "Yellow!" " - Dream
Black Roses (Overprotective!Bad Guy Sans' x Child!Reader) door JulesRedenger
JulesRedenger
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Nightmare found a young child a long time ago. When they fell into a coma it sent him over the edge. several hundred years later the child wakes up in a castle of darkness, surrounded by people, er... skeletons, that they don't know. Now they are being raised by murderers, cannibals, and world destroyers. Oh yeah! And their Uncle is the god of Death. Fun. WARNING (but not really): This story has been known to give people heart attacks and possible death from wholesome cuteness. I am not responsible for said medical emergencies or deaths. Read at your own risk. ~~~~~~ || Few things. 1) The first couple of chapters are going to basically just be Nightmare, but it's for plot reasons. 2) Dream is definitely going to be a little ooc. Don't like it, don't read. This is just for fun. 3) Like I said, this is just for fun. So, updates are when I feel like it. 4) I'mma try to keep the pronouns for (Y/N) gender neutral, but I may just drop that at some point. Depends mostly on what you guys prefer. 5) any art or videos added are not my own unless explicitly stated. Cool? Great. Let's get started.
Mama Nootmare door HotaruBlue13
HotaruBlue13
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Warning: Art is not mine!! Undertale is not mine or any of the Au's!! I only own the plot line, kinda!! This just started just an idea, then I made it into something, sooo, here you go! --- Nightmare lived on the Earth for a long, long time, he's seen it all, but when an outbreak that causes humans scientists to go after young skeletons. Nightmare can't help but be pissed!
Switch (crossmare)  door discontinueeed
discontinueeed
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If you like Nightmare being a smoll who is now in the story plot that Cross usually is and a Cross that's now basically nightmare then you are in luck cause this book is for you!!!! Edit This book is based on characters that are not created by me (I have to add this now sense this book is getting kinda popular)