Undertalecrossover Stories

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...

Harry Potter was master of death, he was use to ending in other universes/timelines. This time he ended up as a skeleton monster Remake of Death and wingdings om ao3 201...

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...

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...

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...

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...

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...

♡ : 𝘯𝘢𝘵𝘴𝘶𝘬𝘢𝘴𝘩𝘪𝘪 - 𝘢 𝘸𝘰𝘳𝘥 𝘶𝘴𝘦𝘥 𝘸𝘩𝘦𝘯 𝘴𝘰𝘮𝘦𝘵𝘩𝘪𝘯𝘨 𝘦𝘷𝘰𝘬𝘦𝘴 𝘢 𝘧𝘰𝘯𝘥 𝘮𝘦𝘮𝘰𝘳𝘺 𝘧𝘳𝘰𝘮 𝘺𝘰𝘶𝘳 𝘱𝘢𝘴𝘵. ... 𝘣𝘶𝘵 𝘯𝘢𝘵𝘴𝘶...

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!

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

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...

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...

Sans Undertale goes on wacky misadventures throughout the known multiverse.

ehjedhi did this cauz i bord

Yep, I've gotten into UnderTale a bit. Here ya go

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...

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...

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.