One great 'My Hero Academia' crossover fanfiction is the one where they cross over with 'One Piece'. It combines the unique powers of the 'My Hero Academia' world with the adventurous and diverse world of 'One Piece'. The characters interact in really interesting ways, like Midoriya being amazed by Luffy's Devil Fruit powers and Luffy being intrigued by the concept of Quirks.
One idea could be that Kakashi is somehow transported to the My Hero Academia world. He could become a teacher at UA, using his ninja skills and wisdom to train the students in new and unique ways. His Sharingan would be a very interesting power in the MHA universe.
One idea could be that Godzilla arrives in the My Hero Academia world during a major villain attack. The heroes initially see Godzilla as a threat but soon realize that he is targeting the same villains who are causing environmental destruction. His massive size and power could be a game - changer in the battle.
A great crossover idea is with the Dragon Ball series. The powerful Saiyans could interact with the My Hero Academia characters. Goku could train the students at UA to reach new levels of power. Also, a crossover with the Attack on Titan world would be intense. The heroes would have to deal with Titans in a whole new way and use their quirks in that battle - filled environment.
The Powerpuff Girls. Blossom, Bubbles and Buttercup in the world of My Hero Academia would be amazing. They could team up with the female heroes like Uraraka and Tsuyu. Their superpowers could combine with the quirks in some really unique battles against powerful villains.
A cool My Hero Academia crossover fanfiction idea would be with the Avengers. The heroes from UA could team up with the Avengers to fight a common enemy. For example, a powerful villain who can absorb quirks and powers. It would be interesting to see how characters like All Might and Captain America interact, and how their leadership styles differ.
One possible plot could be that the Omnitrix from Ben 10 somehow ends up in the My Hero Academia universe. Ben could team up with Izuku Midoriya. Ben, using his various alien forms, could help in hero battles against villains. For example, Heatblast could be useful against ice - based villains in the MHA world. And Izuku could learn a lot from Ben's experience in handling different powers and situations.
To write a good All My Hero Academia Crossover Fanfiction, start with a strong concept. Decide which other universe you want to cross with and why. Then, focus on character development. Show how the characters from different universes interact and change each other. Also, keep the pacing right. Don't rush through the story or drag it out. Use vivid descriptions to bring the crossover world to life. For instance, if it's a crossover with a steampunk world, describe the gears, steam, and unique technology in detail. And always stay true to the essence of My Hero Academia while exploring new ideas.
Well, a really common trope is the 'Team - Up' one. You'll often see My Hero Academia characters teaming up with characters from other shows or universes. It creates interesting dynamics as they combine their different powers and personalities. Then there's the 'Mystery Visitor' trope, where a character from another world suddenly shows up in the My Hero Academia world and everyone has to figure out who they are and what they want. And of course, the 'Battle Royale' trope, where characters from different worlds are pitted against each other in a big fight.
Well, it could be about the heroes from My Hero Academia getting caught up in the events of Infinity War. Maybe Thanos targets the quirks in the MHA universe. Deku might try to use his One For All to stop Thanos, seeing it as a great evil. And the Avengers could be confused by the existence of quirks at first.