What would happen if the Undertale multiverse collided with the My Hero Academia multiverse? First off, I may not continue the story. I'm just trying to practice, so don't expect any more. But if people like the idea, I can try.

Frisk succeeded in freeing the Underground from the Barrier, and all is freed back to Tamriel... too much they see is wrecked with strife from the Thalmor, and now a Dragon Menace. Teamed up with Jin, a former Soldier of the Imperial Empire, and the fated Dragonborn, they all travel to stop the Dragon Meance, and the Thalmor in a unlikely alliance. (Pairings Undecided)

What would happen if Flowey came to the HTTYD world? (This story needs serious work)

Adrian Shephard, a HECU Corporal, manages to somehow escape Black Mesa and, after being 'detained' by the ever-so-elusive G-Man, is assigned a mission... in the UNDERGROUND! Accompanied by Chara Dreemurr, the first fallen child turned ghastly apparition, they adventure through for one very specific goal... but is that all there is to it?

Oh wow, Sans dropped into another universe, how original... Wait until you see why AU's are by nature an endless well of mess! (Story begin at G.I. 4.2. Update, actual as of 4.3, anything afterwards isn't going to cause rewrites.)

This is a story of Percy Jackson falling into the world of Undertale sometime after the Heroes of Olympus series. He goes through the journey of the game you know, but with some twists along the way. When Sans comes face-to-face with Percy Jackson and sees his insanely high level, how will he react? And what will Percy decide? Find out if you wish.

What if Frisk went to the world of Fairy Tail?

This small spinoff story of "Journey of a Saiyan" follows Stryker; a human with the ability to manipulate ki who manages to find himself in the underground and is on a quest to escape and free everyone. He'll need all the determination he has to make it through without the help of Cherik at his side.

A simple question arose one day. What happens if some fandoms and their events take place in the same universe, on the same planet and in the same world, while somehow intersecting with each other? Now with this answer I want to share with you. It all started with a kind fairy tale, telling about friendship and kindness, and a family where there is a child who owns a power...

When Rose Bakugo comes home for a vacation she has a choice to make , will she be able to make the right choice I don't own my hero or Undertale I just own Rose my oc Full credit for the summer goes to my friend Dillon editing is done by him and one other friend of mine.

What if Frisk from Undertale went to the world of One Piece? See what happens as Frisk goes on a new adventure!

He just wanted to leave it all behind and when he thought that his death gave him exactly that, a reprieve from the family he hated, he woke up again. Well, if they cant reach him and only memories remain, then maybe, just maybe he can start over. Maybe he can live a life free of solitude and hatred. Yes, that sounds nice. Gamer/OC Harem

They had just died, he had just woken up in his own mind and they were just created an hour ago. Now, after some messing around by a higher power, all three end up in the same body with a system that entered lockdown mode after having its connection with the host severed. Now, they have to figure out how to get their own bodies while also having to put in effort for once.

It was any other day in Gensokyo, the land of fantasy. That is until a mysterious child appeared, falling from a great height and injuring themself. Reimu, the Maiden of the Hakurei Shrine, took the child in to heal them. Frisk, now part of this new world, seeks to explore it. Both don't know that this appearance will lead to an upheaval of Gensokyo's powers.

"This was never meant to happen, you should have just brought them back." Player said as he went to delete her , but then something caught his eye. The Monika lover smiled as he looked at the Heart. "Maybe you can still learn." He moved her file over to UNDERTALE and opened it's files. He was finding a spot to put her, hovering over Frisk's. Then the lightning struck them..

The Underground had seen an incalculable number of resets. Frisk, Sans and Flowey are tired of each reset, but in one reset, two new people fall into the Underground. Will these two break the cycle or will they become a part of it? Spoilers for Undertale and Fnaf Security Breach

Remake of my first SOUL Monsters installment! 2 years after releasing Mt. Ebott from the barrier, Frisk wins a contest hosted by Kaiba Corp. to gain tuition at Duel Academy. What awaits her are new friends, new rivals, and perhaps even some love while dealing with two shadowy groups known as the Shadow Riders, and Gastly Shadows for the Sacred Beasts. FemFrisk. FriskxChazz

Meloetta gets hungry and wants to have a bunch of spider cookies from Muffet who challenges her to a match.

They just wanted to be themselves. Their parents didn't listen. They didn't understand. When their parents wanted to send them to a conversion camp, they decided it was time to run away. After an incident in the nearest national park, they find themselves in world of monsters and magic. Then, along their journey, they make friends and find themselves too.

Kai Smith. In the Underground. Surrounded by monsters unlike anything he's ever seen before. All sorts of shenanigans ensue. This should be pretty self-explanatory, let's be real here.

Compa and Iffy were discovering a new mountain called mount Ebbot but they wind up falling into the cavern where the monsters reside. Would they have to fight to get free, or are these monsters not like the ones in Gamindustri? Will the folks in Gamindustri try to save them? Is there a dark secret in these Caverns? Will the two girls know what to do when the time comes?

Welcome to the world of Mt. Ebott, a world populated by humans on the Surface, and Monsters in the Underground that were sealed away many years ago by the Humans. Our keyblade wielding adventurers Rick and Chloe find this world the first of many on their adventures, what sort of dangers await them? What sort of friends will they meet? Come along and find out.

Finally finding an escape from the world of Don't Starve, Wilson finds himself in a world unfamilliar from the one he knew before. He isn't alone, though, Frisk and the monsters he calls his family will be there. Somehow... Wilson P. Higgsbury knows this won't be as easy as keeping himself alive in his old prison.

Sans has gotten himself stuck in the void between worlds in a successful attempt to stop the resets of his timeline. He's not sure how long he's been chillin' alone there, but eventually a chance at escape stumbles his way in from the Veil of Death. His name?—Sirius Black. (no pairings)

Izuku falls into the underground...