There are several places. First, as mentioned, FanFiction.net and AO3 are the most popular. But also, some Reddit communities dedicated to fanfiction or to either the Harry Potter or Naruto fandoms might be helpful. You can post a request there asking if anyone knows of such a fanfiction. Additionally, Tumblr has a large fan community, and you might be able to find relevant fanfictions or at least get some leads on where to find them. When searching, be specific with your keywords and also be prepared to look through a fair amount of unrelated content before you find what you're looking for.
Yes, there might be. The world of fanfiction is vast and full of crossovers. Fans often like to combine different fictional universes, so it's very possible that someone has created a story where Harry Potter is a fan of Madara Uchiha. You can search on various fanfiction platforms to find out.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, and there's a good chance you might find some crossovers involving Harry Potter and Itachi Uchiha there. Another option is FanFiction.net, which also has a wide range of fan - created stories.
You can find Madara Uchiha fanfics on various fanfiction websites. One of the most popular ones is Archive of Our Own (AO3). It has a large collection of Naruto - related fanfics, including many focused on Madara Uchiha. Another option is FanFiction.net. It has been around for a long time and has a wide range of fanfics about different characters, including Madara. There are also some Naruto - focused forums where fans might share their own written fanfics about Madara.
Fanfiction.net is a great place to start. It has a large collection of 'madara uchiha crossover fanfiction' stories. You can use the search function and filter by the relevant tags to find exactly what you're looking for.
Well, perhaps the plot could involve the main character having the powers of both the Harry Potter world and being the heir of Madara Uchiha. They might use Sharingan - like abilities to see through magical illusions in Hogwarts. And they could combine ninjutsu with magic, for example, using a fire - based ninjutsu spell to fight dark wizards.
Try searching on AO3. It has a vast collection of fanfictions from various fandoms. Type in 'Percy Jackson' and 'Madara Uchiha' in different combinations in the search function. You might also check some Naruto - Percy Jackson crossover communities on social media platforms like Reddit or Tumblr. Sometimes, fans share links to their favorite or newly discovered fanfictions there. But it may take some time and effort to find exactly what you're looking for.
A plot could involve a magical experiment gone wrong that merges the essence of Madara Uchiha with the magic of the Harry Potter universe. This creates a new being that has both the powers of the Sharingan and wizardry. Harry Potter and his friends then have to figure out how to deal with this new entity. Is it a friend or a foe? Madara's memories and desires start to influence the new being's actions, leading to a complex situation where the line between good and evil is blurred.
The main character could be someone who was accidentally transported from the Naruto universe to the Harry Potter world as a baby. Growing up in Hogwarts, they have no idea about their Uchiha heritage until certain events start to trigger memories or abilities. They would be a unique character, having the innocence of a Hogwarts student but also the latent power of an Uchiha. Their friends at Hogwarts would help them uncover their true identity, and they would have to learn how to use their Uchiha powers in a world that is completely new to them.
Madara's Sharingan would be a very unique ability in the Harry Potter world. It could be used for things like detecting lies, seeing through invisibility spells that are not as advanced as the Sharingan's capabilities, and predicting an opponent's moves in duels. His ability to use fire - based jutsu could be seen as a form of very powerful and different magic. Also, his physical combat skills would make him a formidable opponent in a world where most rely on wands for combat.
One interesting storyline could be how Fem Harry Potter's magic interacts with Madara Uchiha's Sharingan abilities. Maybe her magic could enhance or disrupt the power of the Sharingan in unexpected ways. Another could be their cultural clashes, as Harry comes from the wizarding world and Madara from the ninja world. They might have different values and ways of doing things, which could lead to both conflict and growth as they learn from each other. Also, a possible plot could involve them teaming up against a common enemy that threatens both their worlds, like a powerful dark force that combines magic and ninja techniques.