One interesting crossover could be the combination of magical elements from Harry Potter and the hunting aspect of Supernatural. For example, imagine Dean and Sam Winchester finding themselves in Hogwarts and having to deal with both magical creatures and their usual demons. It would create a whole new dynamic as they try to figure out the rules of the magical world while also using their hunting skills.
One interesting crossover could be the use of Pokémon abilities in the wizarding world. For example, a Pokémon like Pikachu with its electric powers could be used in a magical duel in Hogwarts. Maybe a wizard might catch a Pokémon and use it as an added weapon or helper, similar to how they use their wands and spells.
In some fanfictions, you might see the Winchester brothers from Supernatural stumbling upon Hogwarts. They could be there to hunt a monster that's been lurking in the Forbidden Forest. The Twilight vampires might be brought in as allies or foes, depending on the plot. Maybe Edward's mind - reading ability could be a useful tool in uncovering secrets within the wizarding world.
One popular one could be 'The Magical Crossover'. It combines the magical elements of Harry Potter with the spooky and otherworldly aspects of Supernatural in a really interesting way. The characters from both universes interact in unexpected scenarios, like Harry and the Winchester brothers teaming up to fight a new kind of dark magic -slash - demonic entity.
One interesting crossover could be the use of spells. For example, a Charmed one might learn a spell from the Harry Potter world like the Patronus charm. It could be used in a new and different way in the Charmed universe, perhaps to fight a new type of demon that is vulnerable to positive magic like a Patronus.
One interesting crossover could be Superman visiting Hogwarts. He might be amazed by the magic there. Maybe he tries to learn some spells, but his superpowers interfere. For example, when he tries to use a levitation charm, his super strength makes the object fly out of control.
One interesting crossover could be a scenario where Harry Potter and his friends encounter Janemba's chaotic powers in the wizarding world. Maybe Janemba's otherworldly abilities disrupt the magic there, and Harry has to use his knowledge of both magic and the strange new power he's facing to set things right. For example, he might combine spells with his natural courage to combat Janemba's minions.
Another idea in pokemon and harry potter fanfiction could be the sorting of Pokemon into Hogwarts houses. Some Pokemon, like Bulbasaur, with its calm and studious nature, might be sorted into Ravenclaw. While Pokemon like Charizard, which are brave and strong - willed, could end up in Gryffindor. This concept can lead to really creative stories about how Pokemon interact within the Hogwarts house system.
One interesting crossover could be the use of magic in the Avengers world. For example, Harry Potter characters could teach the Avengers some basic spells for self - defense or stealth. Another could be a plot where Voldemort teams up with a powerful Marvel villain, creating a huge threat that both the wizarding world and the Avengers have to face together.
Well, a cool crossover might be having Frankenstein's monster end up in the wizarding world. Picture the monster being found by Hagrid. Hagrid, being Hagrid, would probably feel sorry for the monster and try to help him fit in. The monster could then befriend some of the Hogwarts students, like Neville. Neville could teach the monster about plants, and in return, the monster could protect Neville from bullies. Or there could be a plot where Voldemort tries to use the monster for his own evil purposes, thinking he can control it, but the monster has a sense of right and wrong and rebels against Voldemort.
One interesting crossover could be the idea of Aladdin's magic carpet in the world of Harry Potter. Maybe it could be used in a Quidditch match, adding a new and exciting element to the game.