Undertalecrossover Stories

Stanley Filbrick Pines, or Stan for short, had already lived a hard, chaotic life. In the end, he died as he lived-fighting for his family. When Bill Cipher clawed his way back into the world after Weirdmageddon, wearing the body of the poor fool who'd once struck a deal with him, Stan knew what had to be done. He outsmarted Bill one final time, but at a terrible price. With a gun pressed to his head, he pulled the trigger, ensuring Bill's defeat-but sealing his own fate. Ford was there, cradling his twin, desperately trying to save him. But it was too late. The life of Stanley Pines, the man who had tricked demons and shielded his loved ones, was finally extinguished. Or so it seemed. Fate and Destiny, ever-mysterious forces, weren't finished with him. Death was not the end for Stan-it was a doorway. When his eyes opened again, he wasn't in the afterlife, nor the world he once knew. He found himself in a new body, a child's body... fragile, skeletal, yet brimming with light. Stan had been reincarnated as Dream Sans, guardian of positivity, in a strange and unpredictable multiverse known as Dreamtale. For the first time in his many lifetimes, he had a chance to start fresh-with a new purpose, and even a new older twin brother by his side. The man who once called himself Stan Pines now carried the mantle of a guardian, standing at the edge of countless worlds, ready to face whatever destiny had in store. Note: Some written portion here are made by ai but other myself, and the story idea was really in my head as I like to what this what if of Stanley pines reincarnated as Deam sans.

When Lightning and Mater fall down in the underground, they must find a way to get out safely. Along the way meeting new monster friends and a familiar face... Mater's Undertale is a crossover fanfic between both Undertale and Pixar Cars. If you're looking for an Undertale AU regarding the same premise (Mater's Tall Tale) then don't fret, as I will also be working on that too in the future! I'll be updating this fic whenever I can.

At a genocide run Sans unexpectedly wins against ¿Chara? and something strange occurred, the timeline was thrown into chaos. As a result of this chaos, Sans unknowingly was brought to the world of My Hero Academia where lies a world full of quirks. Now we will find out what journey is to unfold with Sans now in this world. Welp this is my first story... so yea..... im pretty sure I'll make a ton crap of mistakes basically typos everywhere.. sooooo just bare with me okay? I'm also always running on boredom and laziness while writing this. Also this is fucking cringe... Welp um..feel free to drop your ideas I'll definitely consider them... ¯\_(ツ)_/¯ Also this story is definitely not original and inspired by a lot of different other stories that came before it {!Completed} .

While exploring Mount Ebott(which was one of the mountains that surrounded Gravity Falls), the Mystery Twins Dipper and Mabel accidentally fell into a huge pit, which led them into the underground where the monsters lived and roamed around. Will they be able to make it out alive without hurting anyone? Or will one of them slowly turn into a megalomaniac? ===================================== I DO NOT OWN ANY OF THE CHARACTERS ALL OF THEM RIGHTFULLY BELONG TO ALEX HIRSH/DISNEY AND TOBY FOX

So I watch X-Tale on YouTube and it got me inspired. So here What has happened? What did he do? Deku wakes up next to his hero version who knows everything, and tries to keep him safe Undertale Deku is suspicious of his hero self. So he investigates, and shocks to what he found... Started: December 3, 2020 Ended: ...

Hi 👋🏻! I'm Bea. This is my crazy story about my friends, who are known as the CreepyPastas. I have a few other friends besides them, buuut let's focus on the CreepyPastas for now, okay? (I am making this as an AU crossover story so none of this is true, okay?! It is for pure fun for me!!! This is something I have had in my head for a while now so it may not be perfect but I will try!!!)

Here is all the stuff for my new Undertale & Deltarune AUS, Mixeltale & Taxlimel (which is an anagram of Mixeltale). I do not own Mixels, Undertale, or Deltarune in any way, shape, or form. Credits to ZootyCutie for the Flipped Sides AU of Mixels & the Messils.

Remember when Chara killed Sans? What happened if instead of him dying, Gaster pulled him into a different dimension and was able to heal them with a healing pink fountain. Sans doesn't understand how everyone in beach city is okay with him around so he bothers no one and tries to find Gaster. Steven Universe was surprised to see Sans like this, since he visited a memory of Sans being happy and without the red scarf. Will Sans be healed, or broken worse than he already is? Is Papyrus really gone? I don't any of these characters but I do own the plot, enjoy! I will add music.

Error and Ink, brothers, are fall into the void in OuterTale. The reason? Nightmare and Dream have turned the whole multiverse against them for their own benefits. Error wakes up in a hospital looking room. He feels squish and soft and sees a girl beside him? "Squid?" "Glitchy?" Error awakened as Apple White, daughter of Snow White! Ink awakened as Raven Queen, daughter of the Evil Queen! How would they live in the world that is filled with 'follow your Destiny' shit. Find out in this crossover, after all, a story always starts at the beginning. Once Upon an ERROR... (inspired by harrish6 and characters may be OOC)

Art ain't mine.I only used it to make le cover.Countryhumans highschool, elemantary and kindergarten au all mashup together cos why not?Other than that this was mosty made for fun, so I would most likely forget about this book in a few days time.

Book cover created by @Krystal_GlitchGirl A collab book series with @Krystal_GlitchGirl This book series will be about the aphmau smp meeting different fandoms, I'll be doing a miraculous x aphmau and a undertale x aphmau crossover and Krystal will be doing a rainimator x aphmau crossover and a aphmau x my inner demons crossover. This book is the aphmau x undertale crossover book. Aphmau and her friends travel to Mount Ebott and fall down finding themselves in Snowdin, while there they get introduced to different aus thanks to Kitty and Sans but what happens when someone within the aus is looking to steal their souls for his own selfish purposes?

The original Mystery Twins wander Glass Shard Beach on a daily basis, looking for adventure. They weren't expecting to actually find something. When their voyage goes downhill, almost quite literally, they find themselves in a new world. What path will they take? Will they try to go home? Will they survive? Gravity Falls/UnderTale crossover Book one: Children Began: August 24th, 2016 Ended: A friend asked me to write a Gravity Falls / UnderTale crossover but she couldn't decide what age to have the original Mystery Twins. So I'm doing it all! (Except Teens) It's going to be a 3 book series so be expecting this. Expect updates every other Tuesday (hopefully)

A little undertale/ Steven universe crossover I made. This is about my past, when peridot, Jasper, and me lived all in the same world. I hope you like it!

ehjedhi did this cauz i bord

Everything sure has changed for the better, not only has all the gems been uncorrupted and the war with the diamond authority has been dismissed but now, all monsterkind is expanding through out the surface. Everything is perfect,so perfect, that Steven starts to feel like he isn't needed anymore. How will Steven cope with this and will Chara help in the end? Find out now! Continued version of Universe tale A/n: Again, none of the characters belong to me and I own a little of the plot but i'm basing it off of Steven universe Future. Also, at first, I wasn't going to make this because I thought it wouldn't be that great but it sorta got 1st place in undertalecrossover, so thank you to all of those who read the first one! I'm also sad Rebecca Sugar has left. WWWWHHHHYYYYYY!!!!!!???????

Sans Undertale goes on wacky misadventures throughout the known multiverse.

I started this while bored during the FSA, and my friends wanted me to upload it. I know it's cringy, I don't really care, lord help him.

A story on how Half-Life meets Undertale...