Undertalecrossover Stories

30 Stories

A pink puffball in the underground (Kirby X Undertale) by TheodoreAiden
#1
A pink puffball in the underground...by MatheusMSB 456
A small crossover between undertale and kirby. how will this adventure go? let's find out No videos or sounds are mine No characters are mine
Universe Tale by Jaybird_Dragon2021
#2
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
#3
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...
Code of the Void: Rise of Deku by bugxrwosg
#4
Code of the Void: Rise of Dekuby bug
--- > In a world where only women are born with quirks, society treats men like they're worthless. Izuku Midoriya is bullied by his sister, ignored by his mother, and...
Judgment of the Demigods: Demigod Karma by xxx_Crescent_xxx
#5
Judgment of the Demigods: Demigod...by Crescent
This is a crossover between Percy Jackson and Undertale After a genocide route, Sans is somehow not dead, and Chara has broken the barrier and mysteriously disappeared...
Society's Contrive [BNHA X Undertale]  by DontAskImN0body
#6
Society's Contrive [BNHA X Underta...by ImN0body
Life itself is unfair. People are lost in the blissful deception, believing everyone is treated the same. But there are those who got it worse, Sans learned that the har...
My Hero...Verse?//MHAxUnderverse Crossover// by Cosintany
#7
My Hero...Verse?//MHAxUnderverse C...by Cosintany
Seconds before disaster, and the end of all AUs, Ink managed to grab the Perseverance Vial. Quickly, before his enemies managed to snatch it from him again, he unleashed...
Here we are by lizzyAfton0634
#8
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...
Universe Tale Future by Jaybird_Dragon2021
#9
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...
Secret Sisters by Flowelette
#10
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!
Fallen Countries by AlyChng123
#11
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...
Into the Darkness ‖ GF X UT by StarFallerXD
#12
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...
Louds In Pun-derland by Cantthinkofonr
#13
Louds In Pun-derlandby ThatOneGuyAtHome
One camping trip gone wrong and here they are. Who would've thought that Mt. Ebott is actually in Michigan and it so happens to be in Grand Venture State Park with the g...
Two Stans Fall Under [Book One] [Gravity Falls/UnderTale] by ColorsFeelSoRight
#14
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...
klee meets undertale ; ᵃ ᵘⁿᵈᵉʳᵗᵃˡᵉ ᵃⁿᵈ ᵍᵉⁿˢʰⁱⁿ ⁱᵐᵖᵃᶜᵗ ᶜʳᵒˢˢᵒᵛᵉʳ ( ◠ ·◠)ა by ryshuko
#15
klee meets undertale ; ᵃ ᵘⁿᵈᵉʳᵗᵃˡᵉ...by ryshuko
♡ : 𝘯𝘢𝘵𝘴𝘶𝘬𝘢𝘴𝘩𝘪𝘪 - 𝘢 𝘸𝘰𝘳𝘥 𝘶𝘴𝘦𝘥 𝘸𝘩𝘦𝘯 𝘴𝘰𝘮𝘦𝘵𝘩𝘪𝘯𝘨 𝘦𝘷𝘰𝘬𝘦𝘴 𝘢 𝘧𝘰𝘯𝘥 𝘮𝘦𝘮𝘰𝘳𝘺 𝘧𝘳𝘰𝘮 𝘺𝘰𝘶𝘳 𝘱𝘢𝘴𝘵. ... 𝘣𝘶𝘵 𝘯𝘢𝘵𝘴𝘶...
The multiverse (Book 1) (+me and @Krystal_GlitchGirl) by Bils1Bitxh
#16
The multiverse (Book 1) (+me and @...by Aria
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...
Fnaftale by fireistheanswer
#17
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...
Undertale x Mixels stuff by CandyLovely148
#18
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...