A hero's soul (bnha and undertale crossover, reader insert) - Catalpa14 - Wattpad

Story cover for A hero's soul (bnha and undertale crossover, reader insert) by Catalpa14

A hero's soul (bnha and undertale crossover, reader insert)

Reads 1,055
Votes 35
Parts 4
Time 16m

Reads 1,055
Votes 35
Parts 4
Time 16m

bnha crossoverfanfiction undertale

This is my first fanfic so it might not meet your expectations. 

This is a bnha and undertale crossover where (y/n) is Sans' and Papyrus' younger sibling. (y/n) is enjoying a nice picnic in waterfall with everyone until they get sucked into the bnha universe. 

BTW (y/n) is going to be classed as gender neural. Of course (y/n) can look however you want like every reader insert and with opportunities to choose, so feel free to describe (y/n) through your eyes it would be interesting to see how many differences there are.

apart from (y/n) and this story/plot nothing belongs to me. obviously bnha characters and undertale characters belong to their creators but unless I say so the art is not mine and most of it was found on google so I'm sorry that I can't give credit where it's due.All Rights Reserved

bnha crossoverfanfiction undertale

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4 parts

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Bloodfall (An Undertale AU) by BlackStormWolf

Ever since the death of his younger brother. Things have gone downhill in the surface world for Sans. Alphys died a few months after Papyrus to a disease, Mettaton and Undyne, especially Undyne, had fallen into a depression. Flowey dissapeared into mt. Ebott, not to be found and Sans is fighting depression and insanity. One day, Sans discovers a suspect to his brother's death. A being that is trapping anyone who had either fallen into Mt. Ebott or stayed behind in snowdin for a while. Sans, along with Frisk and Undyne, go into the underground themselves to confront this being. They must encounter the Bloodfall that traps and kills anyone who dares pass by waterfall. (This takes place after a true pacifist run if one killed Sans in a Genocide run, but reset their game before getting to Asgore(I did this in a way to quit the Genocide route). This is if Frisk choses to do this the Pacifist way. I might make a Genocide one in Story Shorts. Also, My Sans is a human, but feel free to interprate him as a Skeleton if you ever choose to use this AU. Just credit me!)

Undertale/Deltarune x Reader [BIG UPDATE] by BlackTheDetective

The title says enough,but basically YOU are a child that fell after Frisk. You have lost your parents in an ''accident'' And in this story,the reader is MALE And this is my first time writing something so,i might not even finish it. But if i can get enough DETERMINATION i might do a version where the reader is a girl Also both Frisk and Chara(if i make her appear) will be a girl in this story idk why,it makes sense to me. (Truth to be told, idk if i'll ever be able to finish this story, so don't expect much.)

Cursed (Female!Chara x Male!Reader) by Incurvat

[THIS IS THE DEFINITIVE AND IMPROVED VERSION. THE OTHER 'CURSED.' IS DROPPED. I HIGHLY SUGGEST READING THIS AND NOT THE OTHER ONE.] 7 years ago, monsterkind was freed by two heroines. Following their freedom, magic became common for humans. Y/N, a young man who's magic is mighty special, hates it for special reasons. But a certain someone might change his views. Story started on 11/07/2024. Story finished on 23/03/2025. Cover by Nick Nitro. (Yes, Storyshift Chara. But damn, can you blame me ?) Lastly, inspired by Red Eyes from CouldYouJust.

The Boney Hero (Sans x BNHA crossover) by DontAskImN0body

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} .

Home (bad sanses x child reader) by catsinboxes17

You were an average kid, somewhat having a older mind than most of your classmates. you had always been into the undertale fandom, and even knew almost everything about the aus and soul colors. while what seemed like a normal day at school quickly turned around after a huge bang struck the class room next door. in this story y/n is nonbinary and 12-16 years old. But more interpreted as 14 I post a new chapter every 3 day and 5 days at the maximum. WARNING: this story will mention some forms of slight emotional harm. And Sexual abuse. Readers be safe. Please if you are in any danger, contact someone. You are not alone. With that aside enjoy the story . This story is finished as of September 1 2022, I encourage you to read my other story "Our Disturbing Love" And in the next month or couple weeks I plan on creating another bad sanses x reader.

The Angel and the "Demon" (Female Chara x Angel! Male Reader) by all_about_undertale

Everyone carries around their dark secrets if it's just one, or many. It doesn't matter, they can't tell anyone. At least they think so. As for (Y/N), well... he carries a secret no human could imagine. Because he is not really a human. But his will of staying away from the others will soon be tested by a certain someone. ???: An angel? Please, I'm serious! (Y/N) Well, archangel to be exact, more or less... Artwork used for the cover by: yukarintizu (Go check them out, they're an amazing artist!) This story will contain (a little) explicit language, violence, and fantasy violence, and in later chapters sexual content.

Undertale OneShots - They're longing for you by Skeleton_Sinner

These are short Undertale stories, some lemon, some not. None of the artwork belong to me so i'll try to search for all original artists and tag them. If you know which artist a drawing I use belongs to and I have not tagged them yet feel free to tell me and help me with my search. The au's as such don't belong to me either, neither does the game. At the moment I do not take requests but still feel free to give me ideas. Any support is welcome, criticism as well and if I made mistakes, feel free to tell me. It can only help all. If you've read the first few OneShots, I might assure. I've grown a lot in writing over time so if you skip farther to the end you might find better ones.

My Shifter of Perspective~ (SS Chara x Male Reader)/(sscharaxreader) by Samuel254245

I do not own undertale/story shift. Cover art by GanzDraw (found it on google :P). This book is going to take a while to finish (as if anyone would read this shi-), Ahem, but i might update this if it anyone reads it/enjoys it. Y/N in this story is 17, almost 18 and no SS Frisk because ummmm ...plot 👍... Hope ya enjoy~. Update: "I'm taking this shit seriously now. So im ganna try cooking more and more chapters."

He's Mine (COMPLETED)(Yandere Papyrus) by BubblyShip

(UnderTale rightfully belongs to the amazing Toby Fox, I am not creative enough to make that masterpiece. There is a person named symphysins who drew some work of Yandere UT! Papyrus for Sans, and I really liked the idea of a creepy UT! Papyrus and decided to write a short story on it. Also, Frisk can't reset, she never had that ability. The cover is my own art.) "Why is everyone I date dying?" Sans asked, covering his eye sockets. "Am I cursed or something?" "I'm sure you're not cursed, Brother!" Papyrus said, patting his back. "T-There might b-be a Yandere on t-the l-lose!" Alphys piped up. "A Yandere?" Sans asked, tilting his head. "What's a Yandere?" ~~~~~~ Sans felt like something was wrong. Everyone he tried to date ended up dusted, and he couldn't figure out why. So, when Alphys explains to him what a Yandere is, he realizes he might be someone's Senpai. Determined to stop this endless cycle, he teams up with his friends to try and find this psychopath. If only they knew he was closer than expected.

A SANSational Love | Completed | by scooby22foxee

Btw this is my first fan fiction so please don't judge if I make any spelling mistakes or anything. Thanks! Frisk has broken the barrier but humans refuse to allow monsters to come up to the surface. Chara now has her body back, using both hers and Frisk's determination. She has been reunited with her adoptive parents, with Flowey her brother, since Asriel can't stabilise his body to live without a soul, and Frisk who is now her sister. Frisk has also met Blueberry (Underswap Sans) and Edge (Underfell Sans). They live with thier brothers in houses in Snowdin. All three Sans' love Frisk and she loves all three back. Who will she pick? Btw the universes kinda collided but only the skele-bros got stuck in the Undertale universes. (Just use ya imagination) It involves, #friskxsans , #blueberryxchara and edge/fell x one of my oc's (April) All CHARActers belong to Toby Fox😆

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Slide 1 of 10

Bloodfall (An Undertale AU) cover

Undertale/Deltarune x Reader [BIG UPDATE] cover

Cursed (Female!Chara x Male!Reader) cover

The Boney Hero (Sans x BNHA crossover) cover

Home (bad sanses x child reader) cover

The Angel and the "Demon" (Female Chara x Angel! Male Reader) cover

Undertale OneShots - They're longing for you cover

My Shifter of Perspective~ (SS Chara x Male Reader)/(sscharaxreader) cover

He's Mine (COMPLETED)(Yandere Papyrus) cover

A SANSational Love | Completed | cover

Bloodfall (An Undertale AU)

Ever since the death of his younger brother. Things have gone downhill in the surface world for Sans. Alphys died a few months after Papyrus to a disease, Mettaton and Undyne, especially Undyne, had fallen into a depression. Flowey dissapeared into mt. Ebott, not to be found and Sans is fighting depression and insanity. One day, Sans discovers a suspect to his brother's death. A being that is trapping anyone who had either fallen into Mt. Ebott or stayed behind in snowdin for a while. Sans, along with Frisk and Undyne, go into the underground themselves to confront this being. They must encounter the Bloodfall that traps and kills anyone who dares pass by waterfall. (This takes place after a true pacifist run if one killed Sans in a Genocide run, but reset their game before getting to Asgore(I did this in a way to quit the Genocide route). This is if Frisk choses to do this the Pacifist way. I might make a Genocide one in Story Shorts. Also, My Sans is a human, but feel free to interprate him as a Skeleton if you ever choose to use this AU. Just credit me!)