A really cool concept would be if Xander was a Muggle - born in the Potter world but was raised in a different dimension like his own. When he discovers his magical heritage, he brings his different perspective and technology (to the extent that it can work in the wizarding world) to Hogwarts. He could introduce things like improvised weapons made from Muggle items to the Dueling Club, or use his street - smart knowledge to outwit the Slytherins in their schemes. He and Harry would bond over their shared experiences of feeling like outsiders in different ways.
Xander and Harry would be an obvious and great pair. They both have a sense of heroism and a willingness to fight against evil. Xander's more laid - back and humorous nature could balance out Harry's sometimes brooding personality. Another good pairing could be Xander and Hermione. Xander might be in awe of Hermione's vast knowledge, and Hermione could be intrigued by Xander's different way of approaching problems.
Well, it could be a really interesting story. Xander from Buffy the Vampire Slayer has his own set of skills and a unique personality. He might teach Harry some street - smart ways of dealing with things. Harry could grow up with a different kind of courage, one that's more about facing the everyday oddities. Maybe Xander would introduce Harry to a world that's a mix of the magical and the 'normal' strange, like the demons he faced in Sunnydale.
Another common theme is the clash of different mythologies. The show Xander is from might have its own set of supernatural rules and creatures, and when combined with the Supernatural world, there are a lot of interesting interactions. This can lead to stories where the characters have to figure out how to deal with new and unexpected threats that come from the combination of these two different mythologies.
One great Xander crossover fanfiction could be one where he crosses over into the 'Buffy the Vampire Slayer' and 'Supernatural' universes. It might have him teaming up with the Winchester brothers to fight vampires that are a bit more complex than the ones he's used to in his own world.
If raised by Xander, Harry would be more street - wise. Xander has had to fend for himself in a tough world. Harry would pick up on that. He would be less naive about the world around him. His sense of right and wrong would also be influenced. Xander has a moral code that is a bit more flexible than the strict wizarding world's. Harry might be more willing to break the rules if it means doing the right thing in a more complex situation. For example, he might be more likely to help a dark wizard who has been wrongly accused, rather than just following the Ministry's orders blindly.
A 'xander crossover fanfic' typically refers to a piece of fanfiction centered around a character named Xander. Fanfic authors create these crossovers to explore new and interesting scenarios. In this case, it could be that Xander, who may have his own established backstory and characteristics in his original source, is made to interact with different characters, settings, and storylines from other fictional works. This can lead to really creative and unique stories, such as Xander forming an alliance with characters he would never meet in his original story, or having to face new challenges that test his limits in ways that the original story didn't.
Sure, it's quite possible. Fanfiction writers love to blend different fictional worlds. In a 'The Mummy (2017)' and 'Harry Potter' crossover, we could see the mummy's powers being pitted against the spells of Hogwarts students. Maybe the mummy is brought back to life in the wizarding world and causes chaos. There are endless possibilities for interesting storylines in such a crossover fanfiction.
One idea could be that Tinkerbell finds her way into the wizarding world of Harry Potter. Maybe she gets accidentally transported there by some magical mishap. She could use her fairy magic in Hogwarts, like helping to repair broken objects in a more sparkly and unique way compared to the Reparo charm.
A popular one is 'Fem Harry and the World of Middle - earth'. This fanfic is really interesting because it crosses over the Harry Potter universe with Tolkien's Middle - earth. Here, Fem Harry has to adapt to the very different cultures and magic systems in Middle - earth, and there are some great character interactions that add depth to the story.