Undertaleau Stories

1.2K Stories

An Error's Doll by EroseWisp
#1
An Error's Dollby EroseWisp
You didn't have a bucket list or anything, but you wished you could've at least read a few more fanfics or done literally anything fun before dying. Oh well, at least yo...
Bad Sanses x Reader: Parody Version by -Xenon-Aqlas-
#2
Bad Sanses x Reader: Parody Versionby Zarathustra The
These stories are somehow getting overrated. The villain crew and the negative guy himself: Nightmare Sans, falling head over heels over a character who just wants to im...
New Purpose (US!Papyrus x Female!Reader) by OreoDaSkeleton
#3
New Purpose (US!Papyrus x Female!R...by ~Oreo~
Y/N, meets a new coworker that changes her life forever. A monster, doing his best to make a living after moving out of the underground. Sans is this ecstatic, cheerful...
]Sanscest Oneshots[ by Leffee
#5
]Sanscest Oneshots[by Leffee
If everything went well - a bunch of oneshots with a bunch of ships. Rules and requests inside. Also please don't leave any suggestive comments, there's a reason why thi...
Radical Reincarnation (on hiatus!!!) by mothmommy42
#6
Radical Reincarnation (on hiatus...by mothy
when you were walking down the street truck-kun decided it was your turn to be reincarnated Met a God who gave you three wishes strangely enough you choose to be reinca...
Our Pen by R3myR3ad3r
#7
Our Penby R3myR3ad3r
You're the Ink of your multiverse, and you don't even know it. Well, until you meet the Ink of another, along with Error. -NOTES- I made the cover! This obviously isn't...
~ Sans AUs x Reader OneShots ~ by AvocadoDragon
#8
~ Sans AUs x Reader OneShots ~by 🥑🐉
(Book gets better with each OneShot-) Requests are (Closed ❌), Thank you! I've started this when I was in 8th grade, because I've seen a few x Reader books and was like...
Error-centric:unknown's jellyfish garden by Lanmol
#9
Error-centric:unknown's jellyfish...by Lanmol
error-centric,the error's stories.In each story error's ships may be different...and may be rare,but I can promise that wouldn't be too abrupt.hehe... story1:which desto...
As ready as I can be since I'm dust...wait hold the phone! Pregnant!?  by KarmaAkabane425
#10
As ready as I can be since I'm dus...by Karma Akabane
(You know how it goes, someone from our world Ends up dead and becomes dust sans..but somehow pregangt, different things, different personalities etc
Future Paradox by sancest01
#11
Future Paradoxby Undertale fan lover
after a tough battle between the star sanses , the bad sanses patching up their injuries when all of a sudden a portal opened, the last thing they heard were each other...
Undertale: Yan!Sans aus x White Lily Cookie!Reader(Discontinued). by Yakechie
#12
Undertale: Yan!Sans aus x White Li...by Herim Jike
[Read the part about giving away book I'll be no longer continuing this][Why do you like this book 🥲] They finally defeat Dark Enchantress cookie but at great cost... M...
This life as Error Sans. by coolkidindahood
#13
This life as Error Sans.by DaCoolest
⪼A life where our beloved [Reader/REDACTED] died a very.. 'Fun' death. ⪼upon realizing their death, they'd realize that they reincarnated into error sans, a character th...
Remade as a SOUL in Deltarune by Truenote
#14
Remade as a SOUL in Deltaruneby Truenote
When I had just finished creating my character in Deltarune, which was then discarded by the game, everything had suddenly gone bright.
Fandom oneshot book [Requests open] by StarwingSgazer955
#15
Fandom oneshot book [Requests open]by AAAAAAAAAAAAAAAAAAAAAAAAAAAAA...
Taking requests, basically always. Just know I am absolutely horrible at finishing them. Includes fandoms I'm in such as: Hollow Knight OMORI The Owl House Cookie Run A...
A Blind Deal of Destruction-Blind!Error x Nightmare(Errormare) by HappyWriter62
#16
A Blind Deal of Destruction-Blind...by HappyWriter62
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...
Completed
My Villain [Dust Sans x Reader] by sighnerd
#17
My Villain [Dust Sans x Reader]by sigh
A young woman, left alone after her family sadly passed in a car accident, suffers with PTSD and Anthropophobia (Fear of people.) Her only happiness in this world is the...
Desert Sanctuary Guidebook by KarmaSpidr
#18
Desert Sanctuary Guidebookby KarmaSpidr
Clover doesn't give up his soul because justice still needs to be delivered. The Wild East, and later practically the entire Dunes, declares independence. They declare...
Killed it! {Reincarnated as A Killer Varient} by coolkidindahood
#19
Killed it! {Reincarnated as A Kill...by DaCoolest
⪼Beaten up and betrayed, {Name} dies an unfair death because of their best friend. Having their life and their brothers whisked away in a flash. ≫They find that they inh...
A Shift of Events (StoryShift! Chara x Male! Reader) by Incurvat
#20
A Shift of Events (StoryShift! Cha...by Incurvate
The story and some of the events taking in it is inspired by Red_Knife's book : Fallen Determination. One of the best fanfic I've ever read, check it out ! Y/N, a boy wh...