Perhaps the intelligent Potter discovers a new form of magic that is based on intelligence rather than wand - waving. He then has to convince the wizarding world of its potential while also facing opposition from those who are afraid of change. He could start by experimenting on small magical creatures and documenting the results.
One idea could be that the intelligent Potter uses his wits to solve a mystery within Hogwarts that even the teachers can't figure out, like a series of disappearing portraits. He could use his knowledge of magic and non - magical logic to piece together clues.
Another plot idea is that Potter, with his intelligence, is able to communicate with magical objects in a more profound way. For example, he can have a real conversation with the Sorting Hat, learning not just which house he should be in, but also the history and secrets behind the sorting process. This new - found ability helps him in various challenges throughout his time at Hogwarts.
Perhaps in this fanfiction, there could be a group of magical bats that are guardians of an ancient Hogwarts secret. Harry, as he befriends them in his bat form, gets drawn into this mystery. These bats could have their own language and culture that Harry has to learn. For example, they might communicate through a series of ultrasonic sounds that only a bat - like Harry - can understand. This could lead to a whole new adventure for Harry, separate from the main battles against Voldemort but still relevant to the overall protection of the wizarding world.
One unique plot idea is time - travel. For example, a character going back in time to change a crucial event in the wizarding world. Another is the idea of a Muggle - born wizard creating a new form of magic that combines Muggle technology and wizardry. And there are also stories where characters from different Hogwarts houses have to team up in unexpected ways to face a common threat.
A plot idea could be that a group of Hogwarts students accidentally travel to the Avatar world. They are then forced to learn bending in order to survive and find their way back home. Along the way, they discover that there are some similarities between magic and bending, like how both require focus and discipline.
One unique plot idea could be a time - travel scenario where Harry goes back in time and has to work with Lily to prevent Voldemort's rise without changing too much of the future. Another could be an alternate universe where Lily survives and she and Harry have to face new threats together.
How about a story where the magic in the Harry Potter world starts to fade, and they seek the help of Naruto and his chakra - based powers? Naruto then tries to find a way to restore the magic, and in the process, they discover a hidden connection between the two worlds that was long forgotten. This would involve a lot of exploration, both in terms of the physical worlds and the magical concepts in both universes.
A unique plot could be that the Issa Brothers have a special power that can break dark magic spells in the Harry Potter universe. They use this power to help Harry and his friends when they are trapped by Voldemort's dark magic.
One plot could be that Viper has a spell that can control minds, and she uses it on some of the Hogwarts students. Harry Potter discovers this and tries to find a way to break the spell. Loki, being the mischievous one, initially seems to be helping Viper but then has a change of heart and joins Harry to save the day.
Perhaps a story where Harry discovers a hidden connection between his parents and Alice Longbottom. Maybe his mother had a secret friendship with Alice, and through this connection, Harry uncovers a powerful magic or a long - forgotten prophecy that involves both of their families. This could lead to a whole new adventure where they have to work together to fulfill the prophecy and save the wizarding world. In this plot, they might have to face challenges not only from the dark side but also from the wizarding establishment that doesn't want the truth to be revealed.
One idea could be that a character accidentally drinks Polyjuice Potion made from a pregnant person and has to deal with the sudden physical changes and the reactions of others. They might have to keep up the pretense while trying to find a way to reverse the effects, all while exploring the magic behind the potion in a clean, exciting way.
One possible plot idea could be Fem Harry Potter using her siren abilities to charm the dark wizards and turn them against Voldemort. Another could be her struggling to control her siren powers while at Hogwarts and accidentally influencing her friends. Maybe she uses her siren song to unlock hidden magical secrets in the Forbidden Forest.