Sans (AU)/Undertale X ??? Crossover stories
20 stories
The Judgement Hero (Son Of Sans and CharaOCxBNHA) by SansofDestruction
SansofDestruction
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Saito Midoriya was adopted son of Inko Midoriya and brother of Izuku Midoriya. He never got to meet his real father or mother. He soon discovered his semblance, Judgement when he stood up against Bakugo Katsuki protecting his little brother. He will discover more and more of his quirk, but he made his only task to make his little brother complete his dream to become a hero and to protect him.
From Shy Fanboy to Beats-Sing Rapper (Underbeats Sans x Friday Night Funkin) by adamabyss12
adamabyss12
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    Parts 10
Sans is the older, yet shy brother of Papyrus, and a member of the music monster of the underground. Once having began to live in the human world, Sans has become a fan of Boyfriend, who is a rapper, and wishes that he could rap battle against him, but he felt down and believed that this sort of dream is stupid, because he knows that this is not going to happen, and the fact that he is way too shy to even consider doing it, not to mention that he listens to music. He does not sing it. But when Boyfriend and his Girlfriend become missing, and with no one else to help out in trying to find them, it is up to Sans, the most shy and timid of the monsters to search for Boyfriend, learning to become brave in rap battle, and is now being watched over by his new goddess ally/crush.
Welcome to the Future  by SpiritWolfNura
SpiritWolfNura
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For 130+ years, monsters have been extinct with the only things left behind having been their hybrid children. Over the years as the hybrids continued to reproduce and 80% of the world's population went from human to superhuman. With the rise of superhumans came the rise of heroes and villains. AU High. Japan's #1 hero school. A place that produces Japan's finest heroes. A place that hides that last of monsterkind.
Unwanted Glitch (404 x My Hero Academia) ON HIATUS by MJO240
MJO240
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    Parts 6
After some time in the multiverse, Error404 conducts an experiment to try and restore Alphatale. However, it failed, and caused a hole to rip in the multiverse. Error404, being absorbed by the hole, awakens in an unknown universe but...human? What will Error404 do in this new universe and what are his goals? Note: Error404 and My Hero Academia DO NOT belong to me in any way and are credited to their respectful owners! The cover art also does not belong to me!
We'll Show You The Real Meaning of FEAR, DESPAIR, Nightmare and HATE (On-Hold) by RedBlader127
RedBlader127
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    Parts 10
Izuku Yagi is the son of #1 Hero All Might and #9 Hero Psych. His siblings born with a quirk which is contrary to Izuku who wasn't. Izuku was hated, beaten, neglected and bullied for not having a quirk. Nobody loved him, or even cared for him and they made his life a living nightmare for him...And the darkness inside him grew and manifested... Chara and Frisk Dreemur lived a wonderful life in a loving family. But due to being quirkless everyone else hated them and gave them despair, but their family continued to show love to them despite their status. Unfortunately, a fight happened in their neighborhood and it mortally wounded their family in the process. They tried calling a hero or someone for help, but no one responded which resulted in their family dying in their arms. Chara's hate for quirks and heroes and Frisk's feeling of despair inside them grew and consumed them... Amber Lightvale lived in fear all her life. She had abusive parents that beat her up due to being quirkless. No one cared about her and she had a lot of bullies that would chase her and beat her up whenever she left her house. She stayed at home and locked herself in her room to try and avoid her parents and her bullies. The negativity and fear inside her got stronger and consumed her... Now these four incarnations of Nightmare, Hate, Despair and Fear will show the world the true meaning of those words...And take revenge on society for what they did to them.
Undertale x Bnha Crossover (Being rewritten in another book) by CheapClown
CheapClown
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Classic finds himself in a new place after another RESET, later on meeting up with Red. They become friends with new people and eventually meet up some familiar faces. Will they get back to their world or will they perish in the process? !WARNING! -Cursing/Bad words -Disclaimer- None of the art or videos are mine unless I say it is. Undertale and BNHA belong to their rightful owners. Same with the AUs. (Sorry, I suck at descriptions. Slow updates)
Karmatic Retribution (Sans meets Bnha) by BigMits
BigMits
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After countless resets, Multiple genocide routes. The timeline gets unstable and Sans gets teleported in an alternate universe full of heroes. Will he figure out how to get home or will he get stuck fighting villains, heroes forever? (None of the art is by me. All art is to their rightful owners. Same with Undertale and My Hero Academia.) (LIFE IS APPROACHING, I REPEAT! SLOW UPDATES FOR NOW.)
Traitors among us Season 1 (Undertale X Rodamrix) by JeremyAaron0
JeremyAaron0
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    Parts 16
This is a story of the pacifist run where the power TRUE RESET does not exist. (They can still access save points.) Chara, Asriel, and Gaster are still alive (they didn't die) and the monsters and humans are living in peace again. But in this story, something new is coming. . .
Betrayed judgement (FNF X Undertale) by JeremyAaron0
JeremyAaron0
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    Parts 17
BF and GF were searching for an opponent to rap battle with (the usual. . .) and they stumbled into a hole. As they were trying to teleport away, they accidentally teleported next to a skeleton. The two thought that no one knows the power of restarting. But what they don't know is that. . . *all actions have consequences, Keith.
+10 more
Quirkless Judgement (Sans x MHA/BNHA) by JeremyAaron0
JeremyAaron0
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    Parts 32
Just like any other Sans X MHA/BNHA, Sans dies but with Chara. Exactly 100 years later, Sans woke up in the middle of Japan. Will he get the hang of his new world? Undertale and MHA/BNHA not owned by me. By the way, this story only has two seasons. And if anyone is wondering why does MHA look weirder than usual, it's because I've never watched MHA at all.