Quentin Coldwater from 'The Magicians' could be an interesting crossover character. He could visit Hogwarts and share his knowledge of magic from Brakebills. His more cynical view of magic compared to the generally more positive view in 'Harry Potter' could create some interesting dynamics. He might question some of the Hogwarts traditions and magical theories.
One idea could be that Quentin Coldwater from 'The Magicians' accidentally travels to the world of Harry Potter. He could be mistaken for a new exchange student at Hogwarts. He might try to use his Brakebills knowledge, like his unique spellcasting techniques, which would both amaze and confuse the Hogwarts students.
One idea could be that the characters from 'The Magicians' end up at Hogwarts for a magical exchange program. They'd have to adapt to the different magical rules and culture there. For example, Quentin might be fascinated by the concept of houses at Hogwarts, while Eliot could get into trouble for trying to introduce some of his more 'adult' magic tricks from Brakebills.
Hermione and Alice would also be a great pair. Both are highly intelligent and studious when it comes to magic. They could compare their different educational systems, with Hermione being schooled in the traditional Hogwarts curriculum and Alice having learned at Brakebills. They might start off as a bit competitive but then realize they can achieve more by working together, like researching a new and dangerous magical phenomenon that affects both their worlds.
Ron Weasley and Eliot Waugh would be an unexpected but interesting pair. Ron is known for his loyalty and his sense of humor, while Eliot is flamboyant and has his own complex personality. Their friendship could bring out different sides of both characters. Ron could introduce Eliot to the simple pleasures of the wizarding world like butterbeer, while Eliot could show Ron some of the more glamorous and wild aspects of the Magicians' world.
One idea could be a story where the characters from 'Harry Potter' and 'The Magicians' universes somehow cross paths. Maybe the Brakebills students end up at Hogwarts for a magical exchange program. They could learn different types of magic from each other and have some friendly (or not so friendly) competitions.
A crossover with 'Doctor Who' would also be cool. The magicians could get caught up in one of the Doctor's time - traveling adventures. Maybe they help the Doctor solve a magical mystery that's affecting different time periods.
In addition to the Hogwarts characters, some of the well - known Pokemon characters could make an appearance. For example, Ash could visit the wizarding world and team up with the fem Harry Potter. He could teach her some of his unique Pokemon training techniques, and they could combine their skills to face challenges. Team Rocket could also be there, causing trouble in the wizarding world and trying to steal powerful Pokemon or magical items.
The Joker could be an unexpected but exciting addition to this crossover. Imagine the chaos he could cause in the wizarding world. His madness and unpredictability would be a huge challenge for the wizards and witches. And Batman would have to find a way to stop him in a world full of magic, which he is not used to. Also, Snape's complex personality could add more depth to the story when interacting with Batman.
Wolverine and Hagrid would be an unexpected but cool crossover. Wolverine's tough and gruff exterior contrasted with Hagrid's big - hearted and gentle nature. Maybe Wolverine could help Hagrid with some dangerous creatures, using his combat skills and Adamantium claws.
Leonidas from '300' would be a great character to focus on. Imagine his reaction to the magic of the Harry Potter world. He's a fearless leader, and seeing him interact with wizards and magical creatures would be fascinating. He might see the magic as a new weapon or a strange form of sorcery that he has to either embrace or fight against.