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 1,056
Votes 35
Parts 4
Time 16m

Reads 1,056
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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Adoration | Sans x reader by Fml_2171

Sans and Y/N meet on the surface after the monsters are freed. But sans dosnt seem fond of them at first. What will happen? ⚠️TW: There may be some NSFW content, in harmful launage, and sensitive content in this fanfic. If you are under 14, I would not recommend it, but I can't stop you, so be prepared.⚠️ NONE OF THE ART IS MINE ENDLESS I SAY OTHERWISE.

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!)

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😆

Undertale/Deltarune x Reader [Not discontinued.] 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.)

Broken Souls 1 - Sans × Monster!Reader COMPLETE by NeonVixen

Instead of you being a human, you're a monster in the Underground. I will continue to go back and edit or merge parts until I have completed the story. Parts that I am actively working on will be labeled "[under editing]" Also, art cover is an action figure off of fangamer.com. they have more action figure characters that are so cute. I am not affiliated in any way with fangamer.com. This is my 1st story in a VERY long time. I like to do things a little different as far as reader inserts go. 1. Instead of Y/N for your name, I use _______. Why? Because when I'm reading a story and read Y/N I think Y/N and then have to remember the name of the character I've made in my head, where as if I see _____, I immediately replace it with the name because there is no word for me to read. Love it or hate it, comment. I can be persuaded if the masses disagree. 2. I don't do H/C, E/C, etc., because it does the same thing that Y/N does for me. Instead, I will be as vague as I can on insert character descriptions giving the reader more freedom to imagine what they look like without forcing it down their throats. 3. For undertale specifically, I am more inclined to make monster!reader inserts, because that makes more sense to me. This will not always be the case. If the masses prefers human!reader inserts, comment so that I may be persuaded to do so. Also, feel free to ask for requests. The more requests I get, the more inclined I will be to do more stories. They don't just have to be undertale related. I will give you credit for any requests at the beginning of the story.

Despair - Undertale x Male reader by Calamity-boi

(Cover by Hetiru on Deviant Art.) Several years after Monsters returned to the surface, this story follows Y/N, a quiet and reserved highschool student just trying his best to manage his day to day life. Between the bullies, lack of a family or friends, and two new transfer students making everything even more difficult for him, Y/N decides he doesn't need to deal with it anymore - and finds himself at Mt Ebott. ⚠️ WARNING ⚠️ This is a somewhat dark story. If that's not your thing, or if subjects like depression, suicide, and self harm are difficult for you, please do not read this. Otherwise, please enjoy! (Once I actually start adding chapters of course.)

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.

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.

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.

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Slide 1 of 10

Adoration | Sans x reader cover

Bloodfall (An Undertale AU) cover

A SANSational Love | Completed | cover

Undertale/Deltarune x Reader [Not discontinued.] cover

Broken Souls 1 - Sans × Monster!Reader COMPLETE cover

Despair - Undertale x Male reader cover

Cursed (Female!Chara x Male!Reader) cover

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

Home (bad sanses x child reader) cover

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

Adoration | Sans x reader

Sans and Y/N meet on the surface after the monsters are freed. But sans dosnt seem fond of them at first. What will happen? ⚠️TW: There may be some NSFW content, in harmful launage, and sensitive content in this fanfic. If you are under 14, I would not recommend it, but I can't stop you, so be prepared.⚠️ NONE OF THE ART IS MINE ENDLESS I SAY OTHERWISE.