Undertale crossovers
23 stories
The Rib Tickling Hero, Sans! (Undertale x My Hero Academia Crossover) by thefnafreader
thefnafreader
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Ah look, another Undertale x BNHA crossover. In this story, sans always loses to Chara in his never ending battle against her. Then, one day, mysteriously, someone "accidentally" corrupted Chara's SAVE file. Instead of sans being sent to his normal home, he is instead sent to a brand new world, one where heroes and villains exist, and everyone has powers just like him. How will sans cope with the ever setting dread of being stuck here? Is there a way out..? Also, I'm not adding AU sans to this story. Simply put, Ive seen way to many fan stories suddenly shoehorn in AU sans. But if requested I may make an AU with that AU sans instead of classic sans.
Playing Around in a Wonderful World (Konosuba X Player!MReader) by KonoSubaDa
KonoSubaDa
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Konosuba, but the Reader/You takes the abilities of Player. The weird almost Eldritch being from the Undertale AU Underplayer.
The Trio of Remnant Chapter 1: Hatred (Male Sans Reader X Blake Belladonna) by Icetome
Icetome
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This is my first story and it will be about RWBY and the bad time trio, I do hope you enjoy this story and criticism is welcome ( I do not own Undertale, or RWBY, all rights reserved to their respectful owners, THIS GOES FOR PICTURES AS WELL, NONE OF THE PICTURES IN THIS STORY ARE MINE, ALL RIGHT GO TO THEIR RESPECTIVE OWNERS) Also I don't know every detail of RWBY so if I make a mistake please correct me
Remnant's Bloody Demon by 7Hibi7
7Hibi7
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Over the years, multiple villages in Remnant have been destroyed by a single teenage boy, Y/N Dreemurr. The boy has gained many names across Remnant, some are; The Bloody Demon of Remnant The Devil Himself The Son of Salem and The Genocidal Monster.
Sapphire Judge (Undertale x BNHA Crossover) by Corpsetalia-fan
Corpsetalia-fan
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Sans world gets reset and he finds himself transformed into a human girl in a world of heroes and crime. She, however, is all alone, her friends and brother all lost to the past, lost to the last world that she now only has in memory. With this new life, she vows to learn to become a hero, so she can save those who cannot save themselves. She wants to better herself because of all of her past failures. Maybe, in this world, she can make a difference, and not have it all rewound. What happens when the other versions of herself FINALLY find her again, after 4 years of being missing, and not resurfacing? 'It's a beautiful day outside. Birds are singing, flowers are blooming. On days like these, villains like you, should be behind bars.'
Undertale meets Shield by Jaybird_Dragon2021
Jaybird_Dragon2021
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After the barrier on the Underground, the monsters come out but to only be feared by humans. They decide that they will live on MT EBOT, away from the humans so that they do not disturb them. Sans volunteered to go get everything the monsters needed when they needed it. So when a certain skeleton with pink slippers and a blue jacket makes it to the internet and catches the eye of Nick Fury as a potential threat, things get weird. (PS) I do not own Avengers, Undertale, or any of the pictures that might be posted. This is also just a continued version of the original. The link for the original is down below https://www.wattpad.com/story/194991958-avengers-undertale-crossover-skeleton-of-problems The writer for the first two chapters is @HoboBoss8111, I also got sorta lazy with the cover I also got permisson from the writer
Determined or Heartless? [Reaper Reader X Frisk... Chara... Or Both?] by Freakskullz98
Freakskullz98
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Just knowing there is infinite realms to choose... It fills you with Determination. Knowing there is countless of timelines... It fills you with Determination. Meeting someone that is willing to show their love and passion for you... Fills you with Determination. Remembering your made for murdering both Innocent and Guilty... Fills you with Hunger. Wanting to end it all the horror you made ever since you existed... Fills you with Hate. Knowing that you are capable of devouring realms at will... Fills you with Destruction. Knowing that you have the power to choose between good or evil... Fills you with... Confusion.
Mad Time: Abused Dusttale sans m!reader x RWBY Harem by ClockworkWolf8
ClockworkWolf8
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Disclaimer: I do not own Rwby by Rooster teeth, Undertale by Tony Fox, or any of the images, videos, songs or references that are put on this story or any other form of media. Adopted but not cared for, the way that the Xiao Longs, Roses and Branwens have treated you was inhumane. After a certain someone that came into your life gave you the push that you needed to escape, you take a turn for the worse. Now grown up and extremely dangerous, you were offered a position that you couldn't refuse. You will make history remember what happens to those who oppose a broken man, a monster. If only someone could pick up those pieces and fit them together.
Judgment (Yang xiao long x neglected and abused sans male reader) by Leohex11
Leohex11
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Disclaimer: I dont own rwby or undertale those are owned by there respective owners please support the original releases. A/n: Hey guys so i got to thinking in all of the abused and neglected storys that i have seen yang is always one of the abusers and ruby was always nice to you. Well what if she was the only nice on in the family and ruby was mean to you. Well lets find out meet y/n rose and follow him on his travels to prove himself in the world. Oh and by the way just to make this even more fun your also sans so theres that.
Bad time (Raven x male classic sans male reader book 2) by Leohex11
Leohex11
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Disclaimer: I do not own rwby or undertale rwby is owned by rooster teath undertale is owned by toby fox support the original releases* Y/n l/n was killed in battle he died because he wanted to protect the ones he loved her name was raven branwen but after he died raven got back with taiyang yang was left all alone without a father figer but what happens when y/n and his family come back from the grave well lets just say chara and the others are gonna have a bad time . A/n: This is a continuation of judgement read that if you have not already