I'm not sure about a specific one off - hand, but you can check out fanfiction websites like Fanfiction.net or Archive of Our Own. Just search for 'Itachi gives Naruto power' and you'll likely find a bunch of different stories. Some might focus more on the action aspect, while others might explore the emotional side of Itachi's decision to give Naruto power.
One popular fanfiction might involve Itachi passing on a unique jutsu to Naruto. For example, a Sharingan - related power that Naruto can use in a creative way against tough enemies. This could change the dynamics of his battles and how he is perceived in the ninja world.
One possible plot twist could be that Naruto struggles to control Itachi's power at first. Since Itachi's power is very different from his own chakra nature. For example, Itachi's genjutsu abilities might be too much for Naruto to handle initially, leading to him accidentally using it on his friends, causing mistrust among them. Another plot twist could be that the Akatsuki targets Naruto more aggressively, believing he has become a greater threat with Itachi's power. They might send their most powerful members after him, like Pain or Obito. Also, Naruto might discover some hidden secrets about Itachi's power that even Itachi was unaware of, which could change the course of the shinobi world's power balance.
His relationship with Sasuke would become extremely complex. Sasuke might see Naruto as a reminder of Itachi, which could stir up a mix of emotions like anger, envy, and also a strange sense of kinship. Naruto, on the other hand, might try to use Itachi's power to understand Sasuke better, but this could be misinterpreted by Sasuke as Naruto trying to take on the role of Itachi in his life. With his friends like Sakura and Kakashi, they might be initially wary of Naruto's new power. Sakura might worry that Naruto is losing himself to Itachi's power, while Kakashi would be more cautious and observant, trying to guide Naruto to use the power in a positive way.
In Itachi yaoi fanfiction, Itachi is often depicted as a complex and mysterious character. He is usually highly intelligent and powerful, which makes him an alluring figure in romantic or relationship - based stories. His loyalty, whether it be to his family, his village, or his love interest in the yaoi context, is also a common characteristic explored.
He would likely be adapted as a very powerful and mysterious character. His skills in the Naruto universe would translate into some sort of special magical abilities in the Harry Potter world. For example, his Sharingan could be like a super - powerful magical eye that gives him unique insights.
Sasuke is often paired with Itachi in these fanfictions. Since they are brothers, when Itachi time - travels, his interactions with Sasuke are crucial. Sasuke might be at a different stage in his life, and Itachi could try to influence his development. Another common character is Naruto. Naruto's ideals of friendship and peace could contrast with Itachi's more complex and tragic view. Their interactions could lead to interesting plot developments.
Sasuke is often paired with Itachi in these fanfictions. Their complex relationship from the original Naruto series can be explored in new ways in another world. For example, they might be on a mission together in a world full of unknown dangers. Another popular character to be paired with Itachi is Naruto. Their different outlooks on life and friendship can create interesting dynamics, especially when they are in a strange new world where they have to rely on each other more than ever. Shisui could also be paired with Itachi. Since they were friends in the original story, in the fanfiction, they could be reunited in another world and face challenges together, perhaps against a new and powerful enemy.
Well, there might be characters from their clan. Since Itachi is from the Uchiha clan, other Uchiha members could play significant roles. They could be elders or other young Uchiha who are involved in the clan's affairs and in turn, affect Itachi and Izumi's story.
Itachi would probably be very calm and composed. He might see Sarada as a symbol of the new generation of ninjas in the village. He could be gentle with her, perhaps sensing her potential and her desire to grow as a ninja.