If Harry Potter goes to the DC Universe in a fanfiction, it could be really interesting. His magical skills would be a new element in the DC world. He might be confused by the different powers and technologies there. For example, his invisibility cloak would be a different kind of 'invisibility' compared to the technology - based ones in DC. He could also learn a lot from the DC heroes about courage and justice, and in turn, teach them about the magic world.
In a fanfiction where Harry Potter is in the DC Universe, there are countless possibilities. He could introduce magic to the DC world on a large scale. Imagine him using the Patronus charm to protect Metropolis from Doomsday. His wand could be a unique weapon in a world full of superpowers. Also, his knowledge of the wizarding world could help in solving some of the DC Universe's mysteries, like ancient spells that could counteract certain super - powered threats.
Well, he might be seen as an outsider at first. The DC heroes, like Superman and Batman, would be curious about this new guy with his own set of powers. Maybe Spider - Man would try to team up with some of them to fight a common enemy. For example, he could join forces with The Flash and use his speed and Spider - Man's agility to take down a powerful villain.
He would probably be seen as a very powerful and unique being. His chakra abilities could be mistaken for some kind of meta - human power. Maybe he'd team up with the Justice League to fight against powerful threats like Darkseid. His skills in combat and his ability to use shadow clones would give the League an edge in battles.
In the alternate universe, Harry could meet different versions of his friends and enemies. His relationship with them would be very different. For instance, Hermione might be a Death Eater or Ron could be a powerful dark wizard. It would be a huge shock for Harry to deal with these new identities of people he thought he knew well.
In a fanfiction where Harry Potter goes to highschool, he would bring a whole new perspective. He's used to a world full of magic and mystery, and highschool would seem rather ordinary in comparison. However, his magical instincts could still come in handy. For example, he might be able to sense when someone is lying, just like he could sometimes sense the presence of dark magic. His relationships with teachers would be interesting too. Some might see him as a bit of an oddball, while others could recognize his special qualities.
Well, he might be really confused at first. Equestria is a very different world from the wizarding world he's used to. He'd probably be amazed by the magic there which is so different from his own. The ponies might be a bit scared of him initially, thinking he's some kind of strange new creature. But as time goes on, he could start to learn about their ways and maybe even use his wizarding skills to help out in Equestria.
Well, if Harry Potter goes to Neverland in fanfiction, it would be a wild adventure. Harry is used to the rules and magic of the wizarding world, but Neverland has its own unique brand of magic. He might find that his spells work differently there. And he'd probably meet Peter Pan, who has his own set of powers. The two could either become friends or rivals as they each have their own ideas about magic and heroism.
Well, he might use his magic in ways that Camelot has never seen. Maybe he'd help King Arthur with some tough battles using spells like Expelliarmus. He could also introduce the wizards' world to the knights, which would be really interesting.
Well, he might be really confused at first. Japan has a very different culture from the wizarding world he's used to. He could encounter Japanese magical creatures that are unique to their land. Maybe he'll visit a Japanese wizarding school and be amazed at their different teaching methods and spells.
Well, he might be really confused at first. Storybrooke has its own set of magic and rules that are very different from the wizarding world. He could start exploring and find some similarities between the magic there and his own. Maybe he'd team up with some of the characters in Storybrooke to solve problems or fight against a common enemy.