It's a wild concept. Naruto is from a world where physical combat and chakra control are key, while Harry Potter's world is centered around magic. If summoned, Naruto could be seen as an otherworldly being. His presence could create chaos as the wizarding world tries to figure out how to deal with him. He might start challenging the dark wizards using his own brand of justice.
In a Harry Potter fanfiction where a ninja summoned Naruto, Naruto would likely be very confused at first. The rules of the two worlds are so different. But he's a quick learner. He could potentially use his ninjutsu to combat the dark forces in the wizarding world. For example, his ability to sense danger using his chakra could give him an edge against Death Eaters. And his positive attitude might inspire the Hogwarts students to be braver.
Another way the 'Harry Potter is summoned' concept works is when a magical being with great power summons him. This could be a powerful wizard from another land or a magical creature like a phoenix or a centaur. They might summon Harry because they sense his unique magic or because they believe he has the ability to solve a problem that they can't. For example, a centaur might summon Harry to help deal with a dark magic that is corrupting the forest it guards.
Well, if Naruto was immortal in a Harry Potter fanfiction, it could be really interesting. He could use his ninja skills to deal with the magical threats in the wizarding world. For example, his shadow clone jutsu could be used for various tasks like scouting or distracting dark wizards. His chakra control might also help him in learning magic faster as it's a form of energy control similar to magic in some ways.
One consequence could be a power imbalance. Naruto is extremely powerful, and his arrival might disrupt the existing power dynamics in the wizarding world. Another consequence could be cultural clash. The ninja way of life is very different from that of wizards. There might also be confusion as to how his abilities work within the magic - based system.
Maybe for the sake of an interesting crossover. Writers often bring different characters from various universes together to create unique and exciting stories.
One way it could work is if the Asgardians had some connection to the wizarding world long ago. Mjolnir could be a powerful magical artifact in both worlds. Harry could be the chosen one to wield it in the wizarding context, similar to how Thor wields it in his world. He would then have to learn to control the hammer's power along with his own magic.
One way it could work is if there was a prophecy in both worlds that foretold of a hero from each realm coming together. Harry Potter, being the hero of the wizarding world, and Aquaman, the hero of Atlantis, are brought together by this prophecy. They start off not trusting each other, as they are so different. But as they face challenges together, like sea monsters attacking the coast near Hogwarts or dark wizards trying to steal treasures from Atlantis, they learn to respect and rely on each other, and their combined efforts save both worlds.
In the original story, the threats are mainly dark wizards and magical creatures. In the 'Harry Potter is a Cyborg Ninja' fanfiction, the threats could be a blend of magic and technology. Harry's relationships might also change. His friends could be envious or in awe of his new abilities. He might also have new enemies who are after his cyborg technology or his ninja skills. The plot would likely involve more action - packed sequences with Harry using his ninja moves and cyborg powers to fight off enemies.
A possible scenario is that Queen Elizabeth has a magical artifact that has been passed down through generations in the royal family. This artifact draws the attention of Harry Potter and his friends. They come to her palace to investigate, and she becomes involved in their adventures. She could offer them resources and protection in the Muggle world, while they introduce her to the wonders of the wizarding world.
Well, it could be really interesting. The Sharingan, with its abilities like seeing chakra and predicting movements, would be a wild addition to the Harry Potter universe. Maybe an OC with a Sharingan could use it to see through invisibility cloaks, as they're kind of like a form of concealment similar to genjutsu in Naruto. They could also potentially predict the spells that other wizards are about to cast, giving them an edge in duels.
Well, it could work by integrating the magic system of Harry Potter with the power of Susanoo. For instance, the wizards in the Harry Potter world could learn to harness Susanoo's power through their magic training. They might use spells to activate it, like 'Accio Susanoo' to summon it.