Well, it could potentially give him some new ideas. Harry is used to magic in his own world, but the technology - like Dust - in RWBY's world could inspire him. He might start thinking about how to incorporate some of those elements into his own magic, or at least be interested in the different ways power is used in RWBY fanfiction.
Well, it would be quite an interesting scenario. Harry might be really confused at first. The world of RWBY is so different from his own magical world in Hogwarts. He'd probably be intrigued by the unique characters, the battles, and the different kind of magic system in RWBY. Maybe he'd start comparing the ways of fighting and magic usage between his world and RWBY's world.
He might also be a bit confused at times. Some fanfictions deviate a lot from the real events in his life. For example, if there's a fanfiction where he has a completely different upbringing, it would be strange for him to read about. He could also feel a sense of flattery that so many people are interested in his story and want to create their own versions of it.
He might be really surprised. Fanfiction often contains different interpretations of the characters and the story. He could be amused by some creative ideas, or perhaps a bit confused if the fanfiction goes too far from the original story he knows.
If Harry Potter watches anime fanfiction, he could end up having some really strange dreams. The vivid and often wild ideas in anime fanfiction might seep into his subconscious. He might dream about flying on a broomstick while also having some of the crazy powers or going through the strange situations that are common in anime stories. Also, he could potentially get some new ideas for dealing with his enemies in the wizarding world. Maybe he'd learn about some creative strategies from the anime fanfiction he reads that he could adapt to his own battles against Voldemort and his followers.
Well, it could be really strange. Harry Potter is from a world of magic and wizardry, and Blackadder is a very different kind of comical and often satirical world. If Harry were to watch Blackadder fanfiction, he might be quite confused at first. He'd see characters and situations that are so different from Hogwarts and the wizarding world. Maybe he'd find the humor in it, or perhaps he'd just shake his head and wonder why muggles come up with such odd things.
He could start comparing the heroes in Overwatch to the wizards he knows. For example, he might see Tracer's time - traveling abilities and think of it like a strange form of time - turning magic. He may also be a bit shocked at the more violent and action - packed nature of the Overwatch world compared to Hogwarts. Overall, it would be a very strange and eye - opening experience for him.
Well, if Harry Potter watches Avengers fanfiction, he could gain some new perspectives. He might find the technology in the Avengers' world fascinating as it's so different from the magic he's used to. Maybe he'd even start thinking about how the two could be combined in some way to defeat greater threats, both in his world and in the fictional Avengers' world.
In fanfiction, if Harry Potter watches cartoons, he might be amazed by the colorful and magical worlds that are different from his own. He could gain new ideas or inspiration from the unique storylines and characters in the cartoons, which might even influence his actions and thoughts in his own wizarding world.
Well, he might be shocked by how things turn out. He could see the fates of his friends, like whether Ron and Hermione's relationship endures. Maybe he'd find out if Hogwarts still stands strong or if there are new threats to the wizarding world that he hadn't anticipated.
Well, he might be really intrigued. Harry is used to magic in his own world, but the magic and the world of HTTYD in the fanfiction could be a whole new and exciting experience for him. He might start comparing the different types of magic, like how the wizards in his world use wands and spells, while in HTTYD there are dragons with their own special abilities.