Harry could encounter a group of wizarding surfers. They use magic to enhance their surfing experience, like creating perfect waves or making their boards fly over the water. They introduce Harry to a more laid - back side of the wizarding world in California.
One possibility is that Harry discovers a new magical community in California. Maybe there are different types of magic there compared to what he knew in the UK. He could meet new friends who have a unique understanding of magic based on their Californian upbringing.
Harry might meet some American wizarding families that have long - standing traditions different from the pure - blood families in the UK. These families could introduce Harry to new forms of magic and social norms within the American wizarding community. He could also meet American Muggle - born wizards who have their own unique stories of discovering magic in a different cultural context compared to what he's used to.
Scarecrow could also be a main antagonist. His fear - inducing toxins could be a real problem for Harry. Harry would have to use his magic to counter the effects of the fear toxin and also figure out a way to stop Scarecrow from spreading it all over Gotham.
He could meet Scott McCall. Scott, being a werewolf, would be intrigued by Harry's magic. They could become friends and learn from each other. Harry could help Scott better control his werewolf side using magic, and Scott could show Harry how to survive in Beacon Hills' supernatural chaos.
He could meet French pure - blood families who have their own long - standing traditions. For instance, there might be a family that has a special connection to a particular magical forest in France. Harry might also run into French wizards who are experts in potion - making, as France is known for its fine potions in the wizarding world.
Well, he might encounter a whole new set of magical and non - magical challenges. Sunnydale is known for its vampires and demons, so Harry would probably have to use his magic in different ways compared to Hogwarts. Maybe he'd team up with the Scooby Gang to fight the forces of evil there.
Well, it could be really interesting. Harry might use his magic to solve some of Smallville's strange problems that are usually dealt with in more 'normal' ways in the show. He could also introduce the people of Smallville to a whole new world of magic.
He might find that the magic in Storybrooke is very different from what he's used to in the wizarding world. Maybe he'll meet characters who have their own unique magical abilities and stories. He could also face new challenges and form unexpected alliances.