In the Naruto universe, while it's highly unlikely in the official canon, in fanfiction, anything can be made possible. The Sharingan is a kekkei genkai exclusive to the Uchiha clan. Danzo had Sharingan in his arm which he obtained through rather unethical means. For Naruto to get it from him in fanfiction, it could be written through some sort of experimental jutsu gone wrong or right. Maybe a jutsu that was meant to transfer power ended up giving Naruto the Sharingan. However, this would completely change Naruto's power dynamics and character arc as the Sharingan comes with its own set of abilities like the ability to copy jutsu, predict movements, and use genjutsu.
Well, in fanfiction, it could be possible for Naruto to get Sharingan from Danzo. Fanfiction often bends the rules of the original Naruto universe. It could be that Danzo, before his death, had some sort of secret plan or jutsu that was supposed to transfer his Sharingan to someone he deemed worthy or as a last - ditch effort to keep his power alive. And Naruto, being the main character, could be the recipient in this fan - created scenario. But this would create a whole new set of challenges and opportunities for Naruto. He would have to learn to control the Sharingan, which is a different kind of power than his own natural chakra abilities.
It's possible in the realm of fanfiction. Danzo is a complex character with access to many secrets and resources. If he were to give Naruto a Sharingan, it would completely change Naruto's power dynamics. Naruto already has his own powerful abilities like the Nine - Tails' chakra, and adding the Sharingan would make him an even more formidable opponent. However, this would also bring new challenges for Naruto in terms of controlling the Sharingan's powers and dealing with the Uchiha - related baggage that comes with it.
In the original Naruto universe, Naruto doesn't have the Sharingan. The Sharingan is a genetic ability of the Uchiha clan. However, in fanfiction, anything is possible. Writers can create scenarios where Naruto somehow acquires or uses the Sharingan through various means like a powerful jutsu that transfers the ability or some kind of special encounter with an Uchiha. It's a creative way to explore new storylines and character developments that deviate from the traditional Naruto plot.
One possible fanfiction could be that Naruto is on a mission and encounters a powerful Uchiha who, instead of killing him, transfers his Sharingan to Naruto for some mysterious reason. Naruto then has to learn to control this new power while still maintaining his own unique ninja style.
In a fanfic where Danzo gives Naruto the Sharingan, it could lead to a very different Naruto. Naruto might gain new abilities and a new perspective on the Uchiha. He could potentially master the Sharingan quickly with his strong willpower, but he would also have to deal with the dark side of the Sharingan, like the curse of hatred that often comes with it.
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.
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.
He might have increased visual abilities. For example, he could see chakra flow more clearly, which would be a great advantage in battle.
The consequences could be far - reaching in the fanfiction. Naruto's relationship with Kakashi might change. There could be a deeper sense of respect and a new kind of bond formed because of this transfer. In terms of power, Naruto could unlock new jutsus or abilities that are related to the Sharingan. He might be able to combine his existing Rasengan techniques with the Sharingan - enhanced perception. This could make him an even more formidable opponent. However, it could also put a strain on his body. The Sharingan is known to consume a lot of chakra, and Naruto's body might need to adapt to this new power drain. If he overuses it, it could lead to exhaustion or even long - term damage.
Naruto would become much more powerful. The Sharingan could give him an edge in battles, allowing him to copy jutsu more easily. He might be able to use it to analyze his opponents faster. However, he would also have to deal with the negative aspects of the Sharingan, such as the potential strain on his eyes and the risk of overusing it.
One possible fanfiction could be where Naruto, through some strange and unforeseen circumstances, like a powerful jutsu gone wrong that somehow transfers Sasuke's Sharingan to him. Naruto then uses this new - found power in ways that make Sasuke respect him more. For example, Naruto might use the Sharingan's ability to predict movements to counter an enemy's attack and save Sasuke, leading to a stronger bond between them.