Undyne Stories

1.2K Stories

Can I take you to Dinner? Mafi-fell!Sans x Reader.  [COMPLETED] by MissHoll-E-Socks
#1
Can I take you to Dinner? Mafi-fel...by MissHoll-E-Socks
"How rude, not even gonna ask for a name??" He teased. "Why are you here?" You glowered, raising the whisk. The skeleton scoffed: "Well, glad yo...
Completed
Female Chara x Male Reader by yaboitekken
#2
Female Chara x Male Readerby yaboitekken
Decided to just make a Chara story, so it's gonna be pretty dumb. This story is when you left the underground with everyone, INCLUDING CHARA, you don't have feelings fo...
The New Hero (Undyne x Male Reader) by alguemimportante100
#3
The New Hero (Undyne x Male Reader)by alguemimportante100
After commencing the genocide path, (Y/N) (L/N) regrets slaying all the monsters and decides to start again, with a new objective in mind: Free all monsters permanently
Unique Love (Sans x reader) by ArtCookie-_-
#4
Unique Love (Sans x reader)by Art_Cookie~
Monsters were known as a myth to humans. It was told in an old myth book; one with a rare soul, could save all. One foolish human falls down, destined to save a populati...
Completed
De-Termination: Chara X male reader (Completed) by Xuatiel
#5
De-Termination: Chara X male reade...by Xuatiel
Sometimes timelines can have storage 'anomalies', albeit a very low chance, but it is possible! The anomalies can do many things, such as allowing certain things to be c...
Bruised To The Bone: (Sans x Reader) by sweetisbored_
#6
Bruised To The Bone: (Sans x Reade...by sweet.is.bored_
(Y/N). A peculiar soul; A human core, with a skeleton's power. Her parents are ashamed of her, beating her every time they catch her using magic. One day, she accidental...
Mr.  Erratum by CrimsonOrRetry
#7
Mr. Erratumby Crimson/Retry
Error can take it no longer. After centuries of Pain and suffering, Error no longer cares what happens to the people who caused him pain, and now wants to leave the plac...
Sinners- Underfell! Human!Sans x reader [COMPLETED] by deadsoulsm
#8
Sinners- Underfell! Human!Sans x r...by deadsoulsm
Your foster brother, Frisk ran away to the underground, leaving you alone until they came back with some new friends. Another race of human called "monsters" w...
Undertale Comics 1 by crazytitan25
#9
Undertale Comics 1by crazytitan25
Just a bunch of comics about Undertale.I do not own this comics.
Completed
Undertale x Infant!Reader by raac24
#10
Undertale x Infant!Readerby ~Raac~
Taking a journey through the Underground seems fun to experience and to Fight or Act through. But is it really fun when you're just an infant? Will you ever make it back...
Completed
Undertale Au's x reader and deltarune maybe lemon by galaxywolf808
#11
Undertale Au's x reader and deltar...by MeganUwU
Oh god I'm full of regret but idfc so yay I shall do yandere and lemon of course:p get ready for the skele dicks (͡° ͜ʖ ͡°) (͡° ͜ʖ ͡°) (͡° ͜ʖ ͡°)
Royal Blue by dealialestina
#12
Royal Blueby Spilled-my-coffee
Sans knows a lot about secrets; he hides many. But when old burdens emerge from the darkness, secrets, new and old, put his brother in danger; and what else can a good b...
undertale sans x reader oneshots (english) by danthestrawberryman
#13
undertale sans x reader oneshots (...by Dan
well this is my first x reader book hope you guys like it i accept request
Her (Sans X reader) by AddisynDaKilla
#14
Her (Sans X reader)by ٩( ᐛ )و
It's kind of a Sans x reader. I named the character. Oops. Welp, here we go! This has potential I promise. Just give it a chance. Please.
Fallen Angel (Gaster x reader) by Feniksiara
#15
Fallen Angel (Gaster x reader)by Simping for Dream Team and Ba...
An angel. Sign of hope for humans, yet a nightmare for monsters. Powerful, skilled and...beautiful. But what happens when one rebels against the cruelty towards monster...
(Sans x Reader) When Two Souls Meet by ZanaBSparrows
#16
(Sans x Reader) When Two Souls Meetby Zana B Sparrows
Sans has lived through countless timelines. He's seen the kid make friends with everyone, only to give up in the final moments. He's seen the kid killed, over and over a...
Completed
In Control (!FemaleChara x reader) by DesertMarksman
#17
In Control (!FemaleChara x reader)by DesertMarksman
Chara. The demon that comes when you call her. The name that was a bastard to pronounce (CH or K?) I am trying something new, an xreader. Man this is going to lack; I ca...
Completed
Undertale Parent Scenarios by ShadowGirl1996
#18
Undertale Parent Scenariosby ShadowGirl1996
Hey guys this involves Papyrus, Sans, Grillby, Mettaton and Undyne. The others are brought into it later on. I do not own any links, videos, pics, links and/or character...
secrecy (undertale)  by The_Skinny_Legend
#19
secrecy (undertale) by Phoenix White
everyone knows that sans is hiding something, that he knows more than he lets on. But what? What will happen after they fake a genocide?
Undertale React by Crystalize0193
#20
Undertale Reactby Crystalize
Undertale is going to react. This will not be entirely canon and will include aspects of what I believe (backstories, ect.) I do not own the cover and I do not own any o...