Saitama from One Punch Man (just kidding, not really part of the Naruto x My Hero Academia but for comparison). In the actual crossover, Sasuke with his Rinnegan and all his Sharingan - based techniques could be a top contender. He can teleport, use powerful fire - based attacks, and has great combat intelligence. On the My Hero Academia side, Endeavor with his intense fire - based Quirk and combat experience could also be very powerful. But overall, if we consider the raw power and versatility, Naruto in his Six Paths Sage Mode might take the cake as he can fly, has super - strength, and can use a variety of chakra - based attacks.
If we think about it, Izuku Midoriya in his later stages with full control of One for All and all its previous holders' powers could be a strong candidate. But when compared to Naruto characters, characters like Madara Uchiha are extremely powerful. Madara has the ability to control Susanoo, can use powerful genjutsu, and has a vast amount of chakra. He could easily take on many of the My Hero Academia characters. But if we consider the potential of growth in My Hero Academia, characters like Shoto Todoroki could also become very powerful in a crossover if he fully masters his ice and fire powers, though he would still have a long way to go to match the likes of Naruto or Madara.
It's hard to say for sure. Naruto in his final form with all his chakra and Sage Mode abilities is extremely powerful. He could potentially overpower many of the My Hero Academia characters. But All Might at his peak was also incredibly strong. His punches could cause massive destruction. However, if we consider characters like Kaguya from Naruto, with her god - like powers, she would likely be one of the most powerful in a crossover. She has abilities like creating dimensions and is almost unbeatable in the Naruto universe.
It's hard to say for sure, but Naruto would be a top contender. His ability to use the Nine - Tails' power, along with his Sage Mode and Rasengan techniques, make him extremely formidable. Plus, his experience in battles and his never - give - up attitude would give him an edge. However, All Might with his One For All at full power is also incredibly strong. His physical strength and combat experience in the My Hero Academia world are second to none.
It would probably be Sasuke. His Sharingan gives him so many abilities like enhanced perception, the ability to copy moves, and eventually the Mangekyo Sharingan powers. In the My Hero Academia world, these skills would be extremely powerful. He could easily outwit and overpower most of the heroes and villains there.
It's hard to say for sure. Ryu has his powerful Hadoken and Shoryuken techniques. But in the My Hero Academia world, characters like All For One have extremely powerful quirks. He can steal and use other people's quirks, which gives him a huge advantage. However, if we consider the raw power and training of Ryu, he could also give All For One a tough fight.
It's hard to say for sure. But All Might from My Hero Academia has incredible strength and speed. However, in the world of Black Clover, the Wizard King has a vast amount of magic power. If they were to face off, All Might's physical power might be countered by the Wizard King's magical abilities. But if All Might could get in close enough, his punches could be devastating.
Doctor Strange with a Quirk like Eri's Rewind. He could not only manipulate time and space with his magic but also use the Rewind Quirk to reverse damage or even reverse the actions of enemies. This combination would make him a very versatile and powerful character, able to heal allies and counterattack enemies in ways that would be very difficult to defend against.
It could be All For One fused with Thanos. All For One has the ability to steal and accumulate quirks, and Thanos is extremely powerful with his Infinity Stones. Combined, they would have a vast array of powers and a thirst for control that would make them nearly unstoppable. Their knowledge of different universes' powers and resources would give them an edge over any opposition.
It could be Naruto. His godlike form in Naruto already gives him incredible power. If he were to gain quirks on top of that, he would be extremely formidable. His ability to create thousands of clones and his vast chakra reserves combined with a powerful quirk would make him a top - tier character.
In a fanfiction setting, Bakugo might be the most powerful. His explosive quirk is already very destructive. At Hogwarts, he could learn some offensive magic spells and combine them with his quirk for some really powerful attacks. He's also highly competitive and would strive to be the best, which would drive him to master both his quirk and magic faster than others.
Well, it could also be All Might. His One For All Quirk gives him an insane amount of power. In a crossover, if he were to combine his brute strength with some of the techniques from Devil May Cry, like Dante's acrobatic dodging, he could be extremely formidable. He has the willpower and the experience of being a top hero. His ability to change the weather with his punches is something that even characters from Devil May Cry would have to be cautious of.
Probably a combination of All Might and Gol D. Roger. All Might has incredible strength and the symbol of peace status. Roger was the Pirate King with great leadership and combat skills. Together, they would be almost unbeatable, having the best of both the hero and pirate worlds in terms of power and influence.