Undertalefanfiction Stories

Sans can't shake the memories. He remembers the beatings, he remembers the stabs in the back, he remembers the rules and the never ending list of things to do in order to protect his family. What family? Everyone gaster prepared Sans to defend from, for when the human comes down. Silence, it's the one thing I hate too much. Either it's being the laughs from Naptablook or mettaton at the T.V., or Undyne slashing her sword against a training dummy. Alphys stating a logistically easy fact or Papyrus laughing at cooked food. Even if it wasn't those, like in the middle of the night, it was the overlapping flicker of the little candlelight I have next to my bed, the large droplets from my broken roof bottle onto my forehead during the pitter-patter of the rain or the little drips of blood splattering on the floor after a long days training session. Sans knew that none of the others had to deal with this, but he knew he had a reason to continue with it. The constant training, starvation, lack of hygiene, warmth and love. The unhumain way of living. Until it stopped. With his family, and then a human.

Frisk x Sans AU It's a typical high school love story right? Their will be drama, rivals, heartbreaks, and of course love! But what if I tell you "Don't judge a book by its cover"? The protagonist Frisk Found herself inlove with our leading male, Sans! But the two are too stubborn or shy to confess ones feelings, eventually Sans needs to hurry up before he graduates and goes to college. But things aren't always easy in life! The two faces challenges in their love story that may include jealousy, heartbreaks, and Rivalry!! But further more in the story, Frisk found out about her past that will change her life forever!! Will sans accepts frisk's past? Will they be destined to each other? or Frisk is destined to another?? Find out! By reading this story!!👇👇 Anyways this book is full of FLUFF, COMEDY, a little bit of ANGST, and a BIG PLOT TWIST! in the end! so stick around 👌👌

Hello my little beauties ;3 this is my first time writing so don't be hard on me >/////< This is a Frisk x Sans fanfic so if u don't ship don't read Also no lemons will be in this story. Sorry my pretty little sinners Oh and in this story Sans and Frisk are 16. Pap,Ton ton, Undyne and Alphys are 17. I think that's it Ciao my beauties~

Basically a book of all my Undertale things that don't fit in one of my AUs (or I just didn't want to put them in like they are). This will include oneshots, story ideas I never fully wrote or developed, fanart, alternate endings to my books, some backstories, and a couple of Q and A's! This book can be read by itself, but I'd recommend reading my Negative Love and/or Disaster of a Timeline before reading this. I'll put warnings for spoilers in the titles of chapters

{Note: To me Frisk is a girl and so her pronouns are her/she it's just easier for me to write that way} Frisk wakes up at the start of the game, this time she's able to control her own movements once again. With Chara watching her closely and constantly feeling guilty for the past sins she had made, will she ever be able to make it out of the Underworld feeling the same again?

You, a very common girl- wait, no you're not common. You're a monster, not verbally but physically. You are not human!

Just a script for an animation. If you steal this I'll find you :>

"Undertale: Echoes of Determination" is a captivating fanfiction that extends the beloved world of Undertale with new adventures, mysteries, and challenges. This story follows Frisk, the determined protagonist, as they return to the Underground driven by an unshakable sense of purpose. The discovery of a mysterious door leads to a journey filled with intrigue and a darker atmosphere than before. Frisk's unwavering curiosity and their willingness to help others, even when faced with hostility, showcase the character's admirable qualities. As the story unfolds, readers are introduced to new threats, allies, and deeper friendships, all while exploring themes of determination, hope, and the capacity for change and redemption. The narrative beautifully captures the essence of Undertale while offering fresh and engaging content for fans to enjoy.

That's right Ladies and Gentlemen, special long oneshots of our beloved Undertale Monsters! (Requests closed)

A girl named Y/N goes to a normal highschool with normal people. But then everything is changed when the school bully invites Y/N to climb Mt. Ebott.

Writer's Disclaimer: Work in progress; subject to change. Classic Undertale characters referenced are the property of Toby Fox. "UnderVerse" characters are under the ownership of their respective creators, I simply borrowed them because they're awesome. Some liberties will definitely be taken but I try to stay true to the characters... mostly. Please don't hate me too hard. Most if not all images found via Google Search. Chapters may include links to Soundcloud playlists built for that chapter. Character's Note: ~Walks in and salutes the reader, is shifting between the ages of 9 and 18 but always wearing similar clothes (sneakers, blue jeans, hoodie in shifting colors). Hood is pulled up but there's a silvery bluish purple glow under the right side.~ "Hiya, I'm Jilly. My creator is a bit of a ditz when it comes to doing the first person thing, so I get to be here as the stand in. Sorry if you're a guy, but my creator is a chick, so use your imagination. Not like that please. I try to be a classy lady. ~Tries to keep a straight face. Can't~ Ah, who am I kidding? I'm a Filthy Sinner! Hell, this story is rated PG due to language, blood, gore, and violence! We're about to be put through the ringer to hopefully be turned into badasses in the future. Try not to rip my arms out at the elbows, okay? I am simply a form of entertainment. Like characters in your video games, I am a figment of the imagination; 'filled with Determination that is not my own'. I am not in control of my own actions. I'm just words on your screen. That's all I'll be for now. My creator isn't very good when it comes to drawing. I am the latest in a long line of written creations confined to notebooks over the years but I refuse to stay there. I'm an amalgamation of those creations and two months wandering the AUs feeling inspired. If you don't like me, that's fine. I am just a vessel. Happy reading." Signed, O.C. Jillian p.s. send art and I'll replace the google pictures with it

This is my first story here (plz don't judge, lol). Mettaton and Kuyar had been married for some time, and they had been living in a nice rental house on the surface together, and Napstablook was living with them, as well. Kuyar wakes up in the middle of the night one night and they get an unexpected visitor...

Came up w/ this idea at 1am. Chara records their thoughts on their experiences in the underground as they begin to lose hope.

Frisk is a 17 year old girl who goes to Ebott High. Sans is a 18 year old skeleton who has feelings for Frisk. Frisk freed the monsters from the Underworld and they go to the New Highschool. Frisk has had mixed feelings for her skeley friend, Sans. Read to find out more. Chapters will be uploaded weekly If I'm not busy. Character credits go to the awesome Toby Fox.

Well I've been reading for quite a while these crossovers where Sans (undertale) suddenly ends up in the My Hero Academia universe, so I decided to write one as well! Just wanna say that it's the first story for me to write, I wonder it will be even a little bit good. Anyway, enjoy reading! I do not own any of art used here! Same for Undertale and Mha! To understand this story you probably need to know the story of MHA, same goes for Undertale, though THE STORY WONT BE EXACTLY THE SAME AS THE ONE SHOWED IN ANIME/MANGA. Some of the incidents won't take place at all, so just to let you know, this story doesn't show the same story just with Sans participating in all the events that happened in MHA.

When Frisk Finds Out That Chara's Birthday Is Just Around The Corner, It's Up To Her To Make Sure Chara Has A Happy Birthday This Time Around. Will Frisk Achieve Her Goal Before The End Of Chara's Birthday? Or Will She Go Too Far And Lose Everything She's Worked So Hard To Protect?

sans was camping in the woods one day when he met a peculiar blue hedgehog. little did they know, the meeting would change their lives forever.

The title says it all. Sorry this is my first book so it's probably a piece of crap. Will contain mature content. Such as, swearing, abuse, general violence.

Many know the tragic story of Chara and Asriel, tragic enough to set up the events of much pain and suffering throughout the Underground. The same children, in a different world, a different story. A tale of an angel, and a demon, whose bond would shape the foundation of the Underground.

Some weeks after a pacifist route, everyone seems to be enjoying their new lives at the surface. Metatton started a new show with Blooky and Shyren, Toriel and Asgore got back together and adopted Frisk, and Alphys and Undyne, well... you could say they're having fun. Though Frisk feels like something's missing. So they return to the underground with Sans and... a Temmie. Warning: this contains angsty scenes, maybe some ships, Sans' jokes, and bad English (Im not native). Hope you enjoy!