Sonic was in the middle of an important mission with his friends. He soon winds up accidentally causing Chaos Control! Now he finds himself in an unlikely situation… he’s surrounded by quirks & even more heroes! He soon runs into some unlikely allies so they can help him find his friends and get them home. Little does he know that Dr. Robotnik is here in Japan…

When a strange multi-colored portal opens up and takes Izuku, he finds himself in a strange new world. Meeting Sonic and his friends, he is determined to find a way back home, while simultaneously wanting to protect this new world he’s getting accustomed to.

The wars were of the past, and while there was still villanous activity around the world, humanity enjoyed a relative peace. Then it all started to change when a single video went viral.

When little Izuku was about to be bullied by Katsuki again, something strange and dark happen when a mystery dark orb that gives Izuku his own power that makes him stronger and furry like a werewolf, except he's more of a hedgehog in this case. Now Izuku will go on this path to become a hero known as Deku the Werehog of Hope! Hear him Howl! No One for All Deku. Deku/Harem. Lemon.

After being injured by Dabi, Instead of making it to the Medics, Hawks is hit by a portal quirk that sends him to Earth Prime. The young woman who takes him in has secrets of her own, and while Hawks is recovering, he decides he likes uncovering a secret or two. After all, Why does she live alone? If this isn't his world, how is she so calm about his sudden appearance?

Thanks to a green emerald, Izuku Midoriya, now has the ability to run at high speeds. He now has a chance to not only become a great hero. But the fastest thing alive as well! But he'll have to surpass those who are stronger and faster than him first. Luckily, U.A is the perfect school to help him out.

Sonic and Sage after give up their live to fight The End now are in a new world with a metal human society. What impact will they leave?

After defeating the Time Eater, Sonic finds himself in a world full of superheroes! People go to school to be a hero? That sucks!

She was four when she met him. She didn't know it then but that was the day she'd fallen for him, and years later sees her confession coming about. She'd never wanted to become a hero, but blessed with these powers far beyond imagination, she decided that she would achieve his dream for him. However, fate has a funny way of tying them together. FemShadow x Izuku romance.

Shortly after Izuku receives One For All, he vanishes without a trace. A week later, he reappears... as a mint green furred rabbit creature that's capable of breaking the sound barrier in his sneakers. OR After finding a piece of the Dimensional Diamond, Izuku Midoriya finds himself transported to Mobius and transformed into a rabbit. And learns from Sonic how to be a true hero.

(Sonic 3 spoilers) After barely Escaping overhaul Eri ran into a Ring and ended up as a White quilled hedgehog and after meeting shadow the hedgehog after the eclipse cannon exploding can they with the help of Agent Stone avoid being captured by G.U.N or will Eri be locked in another prison?

Unknowing on how, why, where, and what happened, Silver the hedgehog has amnesia and now is human. Barely knowing his own name, Silver meets a well known Pro Hero in the land of Japan...All Might. The hero feels bad, knowing on how Silver lost his memory, and offers help, a roof over his head, food and water, and a wild Adventure in class 1-A. But how will things turn? Read&Enjoy!

Shortly after defeating the time eater, both modern and classic sonic find themselves in a world full of superheroes! Can they fight against this world’s villains? But can they survive something even more terrifying?…School! All materials used are owned by Sega and Kohei Horikoshi respectively

All of it was lies, Izumi Midoriya has been living a lie, has been training for a lie but maybe her dream can become a reality. Returning home along with her best friend Kitt the Fennec along with some members of the Resistance and with the help from All Might, Izumi must embrace the new path of being a Hero by going to U.A High School and maybe end the war with Eggman

Fed up with the boredom of the normal events of his plans, Doctor Eggman needed something new…. And then his daughter Sage suggested going to a new world that doesn't have mobians! Will he succeed or will his plans get scrambled?

When team Dark accidentally fall through a portal they accidentally crash The UA entrance exam and participate and now they’re being hunted and for once it’s not because of shadow being the ultimate life form! Can they hide out while helping people and While trying to end some of the corruption in the hero world.

During a incident with eggman Metal sonic and Amy are dropped into a world of Heroes and villains! What sort of adventure will they get into here? And will they ever return home?

Sonic would much rather not go to school, but she doesn't have much a choice, not while Eggman keeps hunting her down in order to fully control her (perhaps a bit too overpowered) Quirk. At very least, she'll get to enjoy the slower things in life with her new classmates. Maybe even her rivalry with the Doc's number one lackey won't be as much of a pain now.

When faced with an impossible dream, people are brought to the limit of their hope. When faced with endless possibilities, people will always take the one that lets them do what they want to do. Izuku Midoriya didn't wish to live in a world that stomped on his dream, and Izuku Chaotix runs through that same world (Cross-posted with Wattpad and ArchiveOfOurOwn under the same name)

The residents of scrapnik island are being given the chance to get off the island if the save a little girl by the name of Eri on a world where 80% of the population has super powers. Will they succeed or will they live up to their name and become scrap

Not all villains need a sympathetic backstory, a deep character, or a redemption arc. Sometimes they just want a good time facing heroes in a bombastic display of power, skills, and madness to take over the world. It's no fun just creating an empire without heroes to fight. Izuku Midoriya learns how much fun it is when finally meeting his real father, Ivo "Eggman" Robotnik.

Weeks after Starfall incident, Eggman returns and up to Sonic Heroes to stop him. But something went terribly wrong and sent to different dimension.

All Izuku wanted to do was deal with his thoughts after being rejected by U.A. The next thing he knows, he's been sent to a different universe by a villain and turned into a different species. Forget about dealing with being rejected from U.A, now he has to deal with an Egocentric scientist who he believed was helping him, mystical Emeralds and a whole bunch of new friends!

Izuku Midoriya was given the extraordinary power of speed and aims to become a hero alongside his friends, Kyouka Jiro and Miles "Tails" Prower. But when they discover an evil plot hatching on their vacation, it's up to this trio to save South Island, and possibly the world.

Ever wondered how characters from other universes would fit into a MHA setting? Wonder no more with the newest class at UA, Class 1-S! The group of students who went above and beyond during the entrance exam. Follow Sonic and his new friends in their crazy new life on their way to becoming Pro Heroes! (Multi-Crossover)