Nightmaresans Stories

An endless cycle of positivity and negativity that clashes within the Multiverse, ignorant of the AU they once called home... Ignorant of the little sister they'd forgot...

Nightmare has died while eating the apple of negativity, and now, Julie as woken up as a female goopy skeleton. Suddenly, Dream attacks! Now known as Moon, she has a mi...

Y/N was a human from a brand new AU...which was practically nothing. They were eventually rescued by the Star Sanses...only to be taken prisoner by the Bad Sanses. What...

Aliza has created another reset only this time she isn't facing the horror house alone. He older sister has joined her, however her older sister doesn't seem to be able...

This is an AU where Error lost all his vision as a cruel trick of Fate. As a result, he has stayed mostly in his anti-void and causing remote destruction from the comfor...

What is Ink was reborn? This is a fan fiction both inspired by the story "reincarnated Error" on Wattpad and "If Blue joined the bad sanses" on YouTu...

When Nightmare said he wanted a group of monsters that would be loyal to only him and cause mayhem, he didn't mean four babybone brats. Now he has to take care of them w...

A women who loves children dies and is face to face with the decision to reincarnate as nightmare sans if she allows herself to be Karmas chosen child. 'Fgod error belon...

#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...

A young person wakes up in the endless Void, transported into the glitching, destructive body of Error Sans. With the power to erase entire timelines at a flick of his s...

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...

Nightmare has his sights set on your au next to destroy for more power, when he decides plans need to change after taking a small liking to one of its inhabitants. (Y/N...

What if there was a multiverse where Error and Ink were friends? What if the voices were the creators? What if they went to the Fgod multiverse because the voices were b...

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...

NIGHTMARE is a sadistic bastard, that's just a fact. His goal is to corrupt Dream's soul and prevent the Doodlesphere from feeling positive emotions ever again. He has a...

What if..someone from our world was reborn as fellswap sans? But an accident when he was young leads to becoming blind for a long time and papyrus feels guilty about not...

Sanses included will be...Classic, Swap, Fell, Swapfell, Ink, Error, Dream, Nightmare, Dust, Killer, Lust, Horror, and Fresh. Please be aware that the pronouns used for...

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...

[Y/N] a human who never truly understood why people hated negativity, and enjoyed any form of positivity. Even if it harmed them. They believed negativity was positivit...

You wake up, finding yourself standing in a desolate grassy field, only the green grass had withered and died, leaving behind a dry, lifeless expanse. Above, the sky was...