Undertalecrossover Stories

28 Stories

Universe Tale by Jaybird_Dragon2021
#1
Universe Taleby }Dunked_on_24/7{
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 founta...
The Boney Hero (Sans x BNHA crossover)  by DontAskImN0body
#2
The Boney Hero (Sans x BNHA crosso...by ImN0body
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...
Completed
Sans-sational Venture in Tensura  by DontAskImN0body
#3
Sans-sational Venture in Tensura by ImN0body
Sans was sick of the endless resets that haunt his world, knowing full well that is the player's fault. As repeating cycle continues something odd happens at yet another...
klee meets undertale ; ᵃ ᵘⁿᵈᵉʳᵗᵃˡᵉ ᵃⁿᵈ ᵍᵉⁿˢʰⁱⁿ ⁱᵐᵖᵃᶜᵗ ᶜʳᵒˢˢᵒᵛᵉʳ ( ◠ ·◠)ა by ryshuko
#4
klee meets undertale ; ᵃ ᵘⁿᵈᵉʳᵗᵃˡᵉ...by ryshuko
♡ : 𝘯𝘢𝘵𝘴𝘶𝘬𝘢𝘴𝘩𝘪𝘪 - 𝘢 𝘸𝘰𝘳𝘥 𝘶𝘴𝘦𝘥 𝘸𝘩𝘦𝘯 𝘴𝘰𝘮𝘦𝘵𝘩𝘪𝘯𝘨 𝘦𝘷𝘰𝘬𝘦𝘴 𝘢 𝘧𝘰𝘯𝘥 𝘮𝘦𝘮𝘰𝘳𝘺 𝘧𝘳𝘰𝘮 𝘺𝘰𝘶𝘳 𝘱𝘢𝘴𝘵. ... 𝘣𝘶𝘵 𝘯𝘢𝘵𝘴𝘶...
Fnaftale by fireistheanswer
#5
Fnaftaleby Proxy of Chaos
I got the idea to wright a Undertale Five Nights At Freddy's crossover after remembering that I've only ever seen one. Also please go give love to my friend @Luna_the_si...
How Bea Afton met the CreepyPastas... by BeaTheFanGirl06
#6
How Bea Afton met the CreepyPastas...by BeaAprilGirl
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 CreepyPas...
Two Stans Fall Under [Book One] [Gravity Falls/UnderTale] by ColorsFeelSoRight
#8
Two Stans Fall Under [Book One] [G...by Babs
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 d...
Undertale x Mixels stuff by CandyLovely148
#9
Undertale x Mixels stuffby CandyLovely148
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...
Fallen Countries by AlyChng123
#10
Fallen Countriesby MARSHYCAT
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 ma...
The multiverse (Book 1) (+me and @Krystal_GlitchGirl) by Bils1Bitxh
#12
The multiverse (Book 1) (+me and @...by Billie's Wife
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...
Mater's Undertale (Cars X Undertale Crossover Fic) by ThatCarsUndertaleFan
#13
Mater's Undertale (Cars X Undertal...by ThatCarsUndertaleFan
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 U...
Here we are by lizzyAfton0634
#14
Here we areby lizzyAfton0634
Undertale x Ninjago This is not my original idea, it was a one shot, that is on fanfic.net. It is under the same name. There's a lot Nya didn't tell the ninja about wh...
Max and the Monsters- a crappy Undertale fic by MaxwellJacksWrites
#15
Max and the Monsters- a crappy Und...by MaxwellJacksWrites
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.
Universe Tale Future by Jaybird_Dragon2021
#16
Universe Tale Futureby }Dunked_on_24/7{
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...
Into the Darkness ‖ GF X UT by StarFallerXD
#17
Into the Darkness ‖ GF X UTby much regrets™
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 le...
Secret Sisters by Flowelette
#18
Secret Sistersby Flowelette
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!