Nightmaresans Stories

1.2K Stories

reincarnated as wyvern (atomictale sans[my au]) by CAMStheCATASAUR
reincarnated as wyvern ( Charli Sanders
what if someone from our world died and was reincarnated as atomic!sans/wyvern? please understand that the au of 'atomictale' was made by me and i dont mind if anyone us...
Reborn as a Shadow Papyrus by UnderTaleHyperFixed
Reborn as a Shadow Papyrusby UnderTaleHyperFixed
Someone dies and are reborn as a Shadow Papyrus. Let's see how thet deal with it shall we?
Reborn as Dream from DreamTale by HyperFixtionSucks202
Reborn as Dream from DreamTaleby HyperFixtionSucks202
One minute I'm peacefully babysitting by little brother, the next in Dream from DreamTale. Does this mean I'm gonna need to act nice towards everyone? One thing's for su...
A light in the darkness |Nightmare x reader| by NekkoetOnTheIntrnet
A light in the darkness | NekkoetOnTheIntrnet
Everyone craves the light. It's what keeps them going. people will do anything they can to keep their light shining, but what will they do if the light extinguish and wh...
Reincarnated as Swap Sans! ( Undertale fanfic) *Hiatus* by Henko_Uchu
Reincarnated as Swap Sans! ( Henko
A reincarnation story but with a twist! You were shot in the head during a school shooting and got reincarnated into Swap Sans! What would you do when you grew up and ha...
Daughter of Error *Rewrite* by Wow_a_blue_cloud
Daughter of Error *Rewrite*by Wow a blue cloud!
You are the daughter of Error and you append in the anti-void one day with your brothers you being the youngest out of them all. What will you do when Ink finds about yo...
A Currupted Starlight by ThatOneCringeGirl
A Currupted Starlightby ThatOneCringeGirl
'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...
Immortality by DahRadSkeleDude
Immortalityby JJ_loves_Ruru
-VERY ANGSTY- Error gives up. there's no point in fighting anymore.. He gets captured but doesn't care. Ink and the council decides to send Error to prison for life but...
Im Sorry.. ( Non-Toxic Swadmare Fanfic)  by inkmaresoup
Im Sorry.. ( Non-Toxic Swadmare inkmaresoup
So you know the ship swadmare? Wellll.... I like it but as long as its not toxic. So this is about nightmare being trapped in some place that is nearly impossible to get...
Nightberry|The Pet by MarshieThedreamer
Nightberry|The Petby Marshie The dreamer
Blue's life wasn't always as it seemed to be he has great friends, and a good life. but his life goes downhill pretty quickly he has Nightmares of Dream's Brother Nightm...
The Ultimate Betrayal by Ehshej3br
The Ultimate Betrayalby Ehshej3br
After his gang left him, Nightmare was left with nothing but his mansion and AU. Feeling lonely and depressed, he struggles to find ways to take his mind off of their be...
Reborn as fellswap san and now I'm kinda blind!? by KarmaAkabane425
Reborn as fellswap san and now I' Karma Akabane
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...
Au Sans Boyfriend Scenarios by The_Skeleton_Simp
Au Sans Boyfriend Scenariosby God Of Destruction
What Would You Do If A Certain Skeleton Was In Love With You. Who Would It Be? Would He Be Cinnamon roll likeBlueberry? Or A Sinnamon Roll Like Raspberry?
Au Group Chat     Bad sans/Star sans/Others by DahRadSkeleDude
Au Group Chat Bad sans/Star JJ_loves_Ruru
Kinda like discord but with the Undertale Aus this will be very stupid
Sans AUs x Reader: Boyfriend Scenarios by GameGeek03
Sans AUs x Reader: Boyfriend Lune Moore
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...
A Burst of SuperNova by Nanachi8
A Burst of SuperNovaby Nanachi
A change can lead to a new outcome, some worse than others or better than expected. When one's curiosity leads to a new life, do you accept the change or destroy it fro...
Malevolence {Nightmare!Sans x Reader} by the_pacifist
Malevolence {Nightmare!Sans x the_pacifist
Being an adult is hard. At 21, (Y/N) is struggling to get by. After dropping out of college, she lost all of her hope and motivation. Thankfully, her older brother Jake...
~ 𝐄𝐱𝐩𝐢𝐚𝐭𝐢𝐨𝐧 ~     {𝑵𝒊𝒈𝒉𝒕𝒎𝒂𝒓𝒆 𝒙 𝑹𝒆𝒂𝒅𝒆𝒓} by dream_syzygy
~ 𝐄𝐱𝐩𝐢𝐚𝐭𝐢𝐨𝐧 ~ {𝑵𝒊𝒈 revival.
100 years after the tragic events of Dreamtale, the two brothers continue a war of hate and love. Any AU unfortunate enough to get in the way of the darker brother's pat...
"you will be mine, darling~ by FuntimeFoxy1234455
"you will be mine, darling~by Funtime Foxy
It was just a normal day in the multiverse, a monday to be exact because the star shits never attacked on mondays so the gang where able to relax when suddenly nightmare...
Sweetheart (Errorink) by Seidro
Sweetheart (Errorink)by 🍥 Soren 🍥
Ink accidentally made a new AU too close to the other, causing a chain of AUs to collapse. The rest of the Multiverse hears about this and comes to the conclusion that I...