One interesting crossover could be a magical school exchange. Wizards from the Harry Potter universe visit Waverly Place's wizard school and vice versa. They could compare and contrast their different magical systems, like how spells are cast or potions are made. It would be really cool to see Harry Potter characters interact with the Russo family and their friends.
A popular pairing could be Harry Potter and Alex Russo. Harry is known for his bravery and his struggle against the dark forces in his world, while Alex is a bit of a rebel with her own brand of magic. Their different personalities could create an interesting dynamic in a story.
One idea could be a crossover where the characters from both universes meet at a magical school tournament. Harry Potter characters could be amazed by the wizarding world in Wizards of Waverly Place which has a more modern and family - centered approach to magic. Another plot could involve a spell gone wrong that transports a Harry Potter character into the Russo family's world and they have to figure out how to get back while dealing with the Russo family's daily magical chaos.
I also liked when the Russo family had to compete in the wizard family competition. The different challenges they faced and the unique spells they used were really exciting. It showed how creative they could be with their magic.
A fanfic could focus on a gay wizard who discovers a new form of magic that is only accessible to those who embrace their true selves. He then has to convince the other wizards in Waverly Place that this new magic can be a great addition to their world, all while dealing with some who are prejudiced against his sexual orientation.
One common theme is coming out. Since the show has a magical world setting, it can be interesting to see how a character's magical identity and their sexual identity intersect during the coming - out process. For example, a wizard might be afraid of how their family's magical traditions will react to their homosexuality.
To create believable character interactions, first understand the personalities of the characters from both universes. For example, Hermione is studious and rule - abiding, while Alex Russo is more impulsive and creative. When they interact, Hermione might be initially shocked by Alex's disregard for some magical rules, but then start to see the value in her out - of - the - box thinking. Similarly, Harry's experience with dark magic could be something that the Russo family looks up to.
A great plot could be that Alex discovers a long - lost spell book that contains spells that are considered forbidden in the wizard world. As she starts to explore the spells, she attracts the attention of an old and powerful wizard who wants to get his hands on the book. Alex then has to protect the book and herself while also deciding if she should use the powerful and dangerous spells.
A fun crossover could also be with a time - travel - based show. The Wizards of Waverly Place could end up in a different time period and meet characters from that era who have their own unique magical abilities. They'd have to find a way back home while also dealing with the new magical situations in that time.
Alex Russo is definitely a popular choice. She's the main character with a sassy and adventurous personality. Her misadventures in using magic and trying to balance her normal life with her wizard life offer a lot of material for fanfiction. Writers can explore her relationships with her family, friends, and love interests more deeply.