A possible plot could be that Harry discovers a hidden room in Hogwarts filled with ancient wizarding gymnastic equipment. He then decides to learn gymnastics with the help of his friends, and they end up using their gymnastic skills to defeat a new dark threat that can only be countered with a combination of magic and acrobatic moves.
The plot could be that Harry, feeling stressed from all the dark magic and Voldemort threats, stumbles upon a Muggle gymnastics event. He becomes fascinated and decides to secretly learn gymnastics. He practices in hidden corners of Hogwarts, using his magic to help him with balance and strength. Eventually, his friends find out and they support him, and he even enters a wizard - Muggle combined gymnastics competition.
The plot could involve a situation where a new form of dark magic is unleashed in the wizarding world, which spreads like wildfire and causes destruction similar to 911. The Ministry of Magic is caught off - guard. Hermione, with her vast knowledge, starts researching a way to counter this magic. Meanwhile, Ron and Harry lead the effort to protect the civilians. They set up shelters in places like the Room of Requirement and use Patronuses to guide people to safety. As they dig deeper, they discover that this dark magic was a planned attack by a long - hidden dark wizard group who wants to take over the wizarding world.
Well, I've come across some. There's this one where Hermione decides to incorporate gymnastics into her study breaks as a form of exercise and stress relief. It was really interesting to see how the author blended the magic of the Harry Potter world with the grace and athleticism of gymnastics. Another one had Ron trying to impress Hermione with his (not - so - great) gymnastic skills during a Hogwarts event. You really have to dig around a bit on the fanfic sites to find the gems though.
One popular 'Harry Potter does gymnastics' fanfiction is 'The Gymnastics Wizard'. It's a fun read where Harry discovers his hidden talent for gymnastics at Hogwarts. He uses his magic to enhance his gymnastic skills, creating unique and amazing routines. It also has some great character interactions, like Hermione helping Harry with the theory behind the physics of his moves.
A good 'Harry Potter gymnastics fanfic' should blend the two worlds seamlessly. For example, it could use magic to enhance gymnastic performances, like using a levitation charm to create more complex aerial moves. It also needs to stay true to the characters. If Harry is in the fanfic, he should still have his brave and determined personality, just now with a love for gymnastics.
There's a fanfic where Hermione takes up gymnastics to improve her physical coordination for spell - casting. It shows how she uses her intelligence to learn new gymnastic moves and incorporate magic into her routines. It's a unique take on the 'Harry Potter' world and gymnastics. The fanfic also has some great descriptions of the Hogwarts gymnasium that was created by magic.
One possible plot could be that Harry discovers a hidden magical dance form within Hogwarts. He starts learning it secretly and realizes it gives him new powers or a deeper understanding of magic.
Well, it could be about Harry Potter being magically transported to Camelot. Maybe he has to use his wizarding skills to solve the problems there, like dealing with magical creatures that are causing chaos in Camelot. He could also interact with the knights and King Arthur, sharing his knowledge of magic with them.
Well, it could be that Harry discovers he has Saiyan blood somehow. Maybe he starts to show Saiyan powers like super strength and the ability to transform. He could use his Saiyan powers to fight Voldemort in a whole new way, like going Super Saiyan and blasting him with energy attacks that are far more powerful than any magic spell.