In a post - Voldemort era, Harry starts teaching parkour at Hogwarts as a new form of physical training for the students. Some students initially struggle, but soon they realize how it can help them in their magical adventures as well, like when they need to quickly reach a hidden magical artifact in a maze - like place on the school grounds.
One idea could be Harry using parkour skills to escape from the Death Eaters in the Forbidden Forest. He jumps from tree to tree, slides under fallen logs, and uses his magical abilities in combination with his newfound parkour skills to outmaneuver them.
Maybe in a parallel universe where Hogwarts has a parkour club. Harry joins it to train and discovers that parkour can enhance his Quidditch skills too. He then uses his parkour - influenced flying techniques during a crucial Quidditch match against Slytherin.
A possible interesting plot could be Naruto discovers a hidden ninja village where parkour is the key to unlocking ancient secrets. He has to master new parkour skills to traverse the village's dangerous terrains filled with traps and challenges, all while facing off against a rival ninja group who also wants the secrets.
Obviously, Harry Potter himself could be the main character. Given his adventurous nature, he would be a great fit to incorporate parkour into his already impressive list of skills. He could use parkour to explore new areas of Hogwarts or to escape from dangerous situations.
One idea could be Harry using parkour skills to escape from the Death Eaters in the Forbidden Forest. He jumps from tree to tree, slides under fallen logs, and uses his magic to enhance his physical abilities for parkour.
There could be a fanfiction where Harry teaches parkour to his Hogwarts friends. They start using parkour to navigate the tricky corridors and secret passages of the castle. It would be really cool to see Hermione using her intelligence to plan the best parkour routes around the school, while Ron is a bit more clumsy at it but still has fun.
One idea could be that during a Quidditch match, a player gets seriously injured. Instead of using magic to heal right away, an ambulance from the Muggle world is called in by a confused bystander. The ambulance crew has to deal with the magical aspects they've never seen before while trying to transport the patient to a Muggle hospital. This could lead to a lot of comical and also tense situations as they try to figure out how to handle the situation.
One idea could be a wizard discovers Beyblades in the Muggle world and decides to bring them to Hogwarts. He then challenges his classmates to Beyblade battles instead of duels. The different houses could form their own Beyblade teams and compete in a tournament, with the winning house getting extra house points and a special magical Beyblade as a prize.
One possibility could be that Supergirl somehow ends up in the wizarding world of Harry Potter. Maybe she's chasing a powerful magical artifact that has fallen into the wrong hands in Hogwarts. She could use her superpowers to help Harry and his friends during a particularly tough battle against Voldemort, like using her heat vision to fend off Dementors or her super strength to break through some dark magic barriers.
One idea could be that Voldemort discovers the power of the Stargate and tries to use it to gain more power. He could send his Death Eaters through the Stargate to conquer other worlds and bring back resources or powerful artifacts to help him in his quest to take over the wizarding world. The Order of the Phoenix would then have to follow through the Stargate to stop him.
One idea could be that the Justice League somehow ends up in the wizarding world. Maybe a magical portal opens during a battle in their universe and sucks them into Hogwarts. Superman's powers could be affected by the magic there, and Batman would be intrigued by the complex magic system and start studying it. Harry Potter and his friends could team up with the Justice League to fight a new dark force that threatens both the magical and non - magical worlds.
In this fanfic, the plot could center around Harry's identity crisis. He's adopted by wolves, so he has this wild, untamed side, but he also has his wizarding roots. He might struggle to fit in when he finally enters the wizarding world. The wolves could have taught him a different moral code, and he has to reconcile that with the rules and values of Hogwarts. This internal conflict could drive the story forward, with him making new friends who either accept or reject his wolf - like qualities.