In fanfiction, Naruto having the Sharingan would be a huge change. It could affect his relationships too. His friends might be both amazed and a bit wary of this new power he has. The Sharingan has a certain mystique in the Naruto world. Naruto might face new challenges related to the Uchiha clan's history and the secrets associated with the Sharingan. And he'd have to deal with the potential curse of the Sharingan, like the strain on his eyes and the risk of going blind if overused.
If Naruto had the Sharingan in fanfiction, it would likely lead to some interesting power - up scenarios. He could combine the power of the Sharingan with his own massive chakra reserves. This might make him an even more formidable opponent. His training would also take a new turn as he'd have to learn to control and master the Sharingan's abilities, like the different levels of the Sharingan and their unique powers.
One implication is that it changes his combat style. He can now use the Sharingan's abilities to predict enemy moves and copy jutsu more effectively. Another is that it might affect his relationships. For example, Sasuke might see him differently. Also, it could lead to new power - up scenarios and different training regimens in the fanfiction.
In fanfiction, if Naruto has the Sharingan, it can change his relationships. He might have a different connection with Sasuke, who is originally associated with the Sharingan. Also, it could lead to new story arcs. For example, he may need to learn how to control this new power, which could involve training with characters like Kakashi who also has the Sharingan. It can also attract the attention of different villains or groups who are interested in the power of the Sharingan.
It can also change Naruto's relationships. His friends might be in awe or even a bit scared of his new power. Enemies would surely target him more. Also, it could mean new story arcs. For example, he might have to deal with the dark side of the Rinne Sharingan's power, like being tempted by its overwhelming abilities. And he may need to find a way to use it for good without succumbing to its potential negative influences.
One implication is a change in his power level. The Mangekyou Sharingan gives access to powerful jutsus, so Naruto would be even more formidable. He might also face new enemies who are interested in his new ability.
He might gain enhanced perception abilities, which would be a huge boost to his combat skills. With the Sharingan, he could predict his opponents' moves more accurately.
If Naruto had the Sharingan, his battle skills would change. Hinata would be both in awe and a bit worried about this new Naruto. Their relationship could develop through her trying to understand this new power of his. For example, she might offer to help him train to control the Sharingan's abilities, like the genjutsu. During these training sessions, they would grow closer and their relationship would take on a new dimension of mutual understanding and support.
In fanfiction, Naruto could get the Sharingan through a blood - related connection that is revealed later. For example, it could be discovered that he has some distant Uchiha ancestry that gets activated somehow. Maybe a powerful enemy's attack awakens this dormant Uchiha blood in him, and as a result, he develops the Sharingan. It could also be that a powerful sage or a new character uses their own unique powers to bestow the Sharingan upon Naruto for a specific purpose.
There would be several implications. Firstly, Naruto's training would take a new turn. He would need to learn how to control and use the Sharingan properly, which could be a difficult task considering his already existing training regime. Secondly, politically, it could cause a stir in the Hidden Leaf. The Sharingan is a symbol of the Uchiha clan, and Naruto getting it from Danzo (who had a controversial relationship with the Uchiha) could lead to various political debates. Thirdly, on a personal level, Naruto might experience new emotions and temptations that come with the Sharingan's power. He might have to struggle with the darker aspects of the Sharingan, such as the potential to be consumed by its power, just as some Uchiha did in the past.
Fanfiction often bends the rules of the original Naruto universe. Naruto having a green Sharingan could be a really interesting concept. It could be that a powerful entity or some sort of ancient magic/technology in the fanfic world has bestowed this upon him. This could lead to new story arcs. He might face discrimination from those who know that the Sharingan is an Uchiha - only thing originally. Also, his relationships with Sasuke and other Uchiha members could take a whole new turn as he now shares a part of their special ability.
Yes, in some fanfictions, Naruto is given the Sharingan. Fanfiction writers often like to play with the concepts and powers in the Naruto universe, and giving Naruto the Sharingan can lead to some really interesting storylines. It might be a result of some kind of power transfer or a unique plot device.