How to be Plus Ultra? That's an easy mix of compassion and strength. Strength of mind, power, and heart. But in a world where corruption reigns supreme, that may be a task that's a lot harder to acquire than it sounds...(Mentions of blood, insanity, death, and blanked-out swears.)

Long ago two beings of Darkness once fought those blessed by Starlight. They Lost, now those two beings became one and gave life to a dying baby. That baby is Izuku Midoriya. Join Izuku as he uses his new power to be a Hero and start his legend as Dekiru of the Fell Star.

Izuku meets an exchange student from America named Bowsette. She seems to have an amazing quirk but what secrets is she hiding?

A MHA and Bowser SI mashed together. Please enjoy. Also Posted On Royal Road

Midoriya always dreamed about becoming a hero even when he didn't have a quirk of his own to work with. But after helping a visitor from beyond the stars one fateful night, he may finally be able to achieve his goal with the help of a princess from outer space.

Izuku Midoriya is framed by the League of Villains and sent to Tartarus. Is this the end of his hero Career? In his world, maybe. But what about in the Mushroom Kingdom's?

It was all perfect with the Giga Cat Bell until a dark being comes in and takes over society. Will the heroes stop this identity and save the planet they live on? Read "Hero's Fury" and find out!

In the vast multiverse there are infinite worlds, infinite possibilities and infinite stories. Our two favorite plumbers and two favorite princesses will be reborn in a world where superpowers or quirks are commonplace. What will happen? How will their presence affect this world? And will they be able to adapt? Let's find out.

After their adventures in the pirate world of One Piece Mario and Luigi, along with Princess Peach, go to the next universe to collect the missing power stars. Is hero society ready to meet the super stars?

izuku was all but ready to give up on his dream, but an unexpected trip down a pipe may give him the chance he needs

When Peach's voice gets stolen, the Mario Bros and the students of Class 1-A travel to the BeanBean Kingdom to get it back, but more interesting things happen on the way. None of these characters belong to me.

Hoped seemed lost to Midoriya as the ideal of being a hero faded away, maybe all he needs is a hat to brighten his day

Izuku's dad had disappeared nine years ago after leaving to go complete a task only he and Inko knew about. Izuku vaguely understood what he had to do, something about the Mushroom Kingdom and being a hero, but that was all. So imagine his surprise when he's suddenly thrust into the world of his father's and expected to become its newest champion? Mario!Izuku.

Izuku Mario is the son of Inko and a Mario, his Quirk is Plumber. Now you may think it means he is good with pipes and clogs, oh how wrong you would be. Pairing to be decided. send in Omakes.

Dry Bowser and Toadette find themselves in the Hero Acadamia, with Ochako having a farting problem and Deku needing to learn how to play tennis.

His Dad may have a villainous reputation, but Izuku is going to live up to it in his own way. Kidnapping princesses? They were in trouble in the first place. Demolishing private property? It belongs to villains so they can't complain. This son of a Koopa is going to be a great hero like his Uncles and Dad, when he bothers with it anyway. Watch out for the Koopa Hero

A joint Exercise between the 2 hero courses of UA High takes a turn for the worst when one of their own ends up taken by a monstrous enemy that claims to be from another world; now enemies must become friends and ally themselves with a warrior from another world if they hope to rescue their green haired friend.