Well, Naruto might also face some internal conflicts. The Sharingan has a dark history in the Uchiha clan, and Naruto, being a symbol of hope and light in the series, would have to grapple with the nature of this new power. It could potentially change the way his friends and allies view him, as the Sharingan is often associated with the more brooding and complex Uchiha characters. And he'd need to learn how to control it without being influenced by the more negative aspects of the Uchiha's power-hungry past.
One possible consequence is that Naruto would gain enhanced visual abilities. The Sharingan can see chakra flow clearly, which would be a great asset in battle for Naruto. He could better analyze his opponents' moves and weaknesses.
Another consequence could be in terms of his combat style. Naruto is known for his brute-force and unpredictable combat with the use of shadow clones and his Nine - Tails chakra. With the Sharingan, he could add a more strategic and precise element to his fighting. He might start using genjutsu more effectively, which is not his strong suit originally. This would make him an even more formidable opponent, but also might require him to train in new areas he's not used to.
With his other friends like Choji and Kiba, they might see Naruto as even more of a leader. The Sharingan is a symbol of great power, and Naruto obtaining it could inspire them to train harder. However, they might also feel a bit of a distance at first, as Naruto now has a power that is quite different from what they have. But overall, Naruto's positive nature would likely help him maintain strong relationships with his friends as he'd assure them that he'll use the power for good.
One possible thing that could happen is Naruto would gain new visual abilities. With the Sharingan, he might be able to copy jutsus even more effectively than before. The Sharingan could also potentially enhance his perception of his opponents' moves, making him an even more formidable fighter in battle. This could change the power dynamics in the Naruto universe significantly.
Well, the plot could start with Itachi realizing that Naruto is the key to the future of Konoha and the ninja world. So, he gives Naruto his Sharingan. Naruto then has to deal with the new power. He might start having visions related to Itachi's past, which could help him understand the Uchiha - Senju conflict better. And this new knowledge could influence his decisions in future battles and political situations in the ninja world.
A simple plot could be that Itachi entrusts Naruto with his Sharingan because he believes Naruto can use it to bring peace to the ninja world. Naruto, being the kind - hearted person he is, accepts the responsibility. He starts training with Kakashi to understand and master the Sharingan's powers. With the Sharingan, Naruto can anticipate his opponents' moves better and uses this advantage in battles against powerful enemies like Pain.
Well, in this fanfiction, Madara could give Naruto the Sharingan as a way to balance the power in the ninja world. Naruto then uses the Sharingan's ability to predict movements in combat. This gives him an edge against enemies who are used to his regular fighting style. He might also discover some hidden abilities of the Sharingan that no one else knew. For example, it could have a unique connection to his Nine - Tails chakra, creating a whole new set of jutsus.
One reason could be some sort of experiment. Maybe Orochimaru or another villain was trying to create a super - ninja and combined the genetic material of the Uchiha with Naruto's. Another possibility is that it's a gift from a powerful being. For example, a god - like entity could have bestowed the Sharingan on Naruto to help him in his quest to bring peace to the ninja world.
One plot implication could be that Naruto becomes an outcast among some in the village who fear the power of the Sharingan. This would create internal conflict within Konoha. Another is that Naruto might be targeted by enemies who want to either steal the Sharingan or kill him to prevent him from becoming too powerful. Also, it could change his relationship with Sasuke, as they both now share a connection to the Sharingan.
In a fanfiction, it could be possible through some sort of transplant. Maybe Obito, in a unique situation, decides to give his Sharingan to Naruto. It could be due to a strong bond they form during a particular adventure, where Obito sees Naruto as the key to saving the ninja world and believes his Sharingan will enhance Naruto's abilities.
I really like 'Obito's New Path'. In this fanfiction, Obito gets a second chance in a different reality. His Sharingan abilities are explored in unique ways, like how he uses it to understand the true nature of the ninja world. The story also has great character development for Obito and other Naruto characters.
One consequence could be that Naruto becomes too overconfident. With all this new knowledge, he might think he can handle any situation easily and take unnecessary risks. Another consequence could be that his relationships with his friends change. He might seem more distant as he delves deeper into the knowledge, spending more time on his own to understand it all. Also, there could be a power imbalance in the ninja world. If Naruto becomes too powerful too quickly, it could disrupt the existing power dynamics among the villages.