Nightmaresans Stories

What if..someone became the same parasite that was fresh? Not as the skeleton, but the parasite, the thing is, when this parasite gets memories of another life and their...

Not mine it's just too difficult trying to find it every time There is no part 2 don't blame me Original Autor @Manuru_15 Only publishing on weekends Also, episode 21...

Sans had SIX different Soulmate tattoos. Not one, not two, SIX. So what happens when he finds them? Er, well, they find him. And let's just say... They're not the kinde...

Science!Sans made a reverse personality potion, they used it on Error, Such a big mistake. What will happen to the multiverse if the merciful destroyer changes? Can they...

'passive' nightmare sans, as people called him, was trapped inside his own soul as 'currupted' nightmare sans controlled his body, spreading negativity throughout the au...

Kinda like discord but with the Undertale Aus this will be very stupid

Life has been harsher to you than most, and at your lowest you meet someone unexpected. He picks you up, dusts you off, and shows you things you wouldn't believe. Now yo...

Dream was replaced by a new young Guardian. Well that's his cue for his retirement but... Oh well, not everyone let him retire and do whatever he wanted to do. Even af...

[Discontinued] Nightmare had been given the power to go back to his Passive form by the multiverse for some unknown reasons. (Totally not because the Deities were bored...

Dream suffered mentally after the apple incident,now he is has to keep the multiverse which has worsen him. After being kidnapped by the Nightmare gang,he doesn't believ...

!! STORY COVER IS MINE, CHARACTERS DO NOT BELONG TO ME EXCEPT Y/N !! (ps, heavily inspired by my other books, mainly Multiverse's Unwilling Protector.) (Book is currentl...

A 19 year old girl is reborn as the sans she created after being killed by a gorilla, but what happens when the multiverse is in love with her? .☆☆☆☆☆Various Sans x SANS...

Ink the creator and protector of Aus had gotten tiered of Nightmare and his little group. Going around and causing mischief in his creations. And so he decided to do som...

What if..someone was transported as a orca mer bit was also killer sans? What if..they were also the reincarnation of killer who was a mer in that au but died a while ba...

ever sense Error can remember, hes dedicated his life to giving his dying brother, Geno, a gift. the gift of a good, strong brother. with Geno's life slowly draining fro...

Formerly known as, "Becoming the Dream of the Multiverse". Book cover is mine. A mistake made by the creator, a wish that was never ever bound to happen. "...

~cover art by me~ (y/n) (your name) is someone about 21 years old. They live alone in their small apartment when they decide they have enough of this loneliness and adop...

what if nightmare woke up without his goop. What if Dream sees nightmare like this? What will happen if nightmare's crush and best friend thinks he's an intruder? I don'...

Night, Prince of Dreamtale, is NOT the same thing as Nightmare. Not one bit. The King of Negativity found a way to separate himself from his host, Night. Taking the nam...

#1 of 61.7k tagged with Undertale 12/06/24 After drowning as a human, Ashe reawakens as a DustTale variant of Sans. With his ghost Papy helping keep him from falling int...