Well, if Naruto gets Shisui's Sharingan in the fanfiction, it could greatly enhance his perception skills. He'd be able to see chakra flow more clearly, which would help him in combat. He might also be able to use some of the Sharingan - specific jutsus like the Genjutsu techniques related to it. This would make him even more formidable against opponents, especially those who rely on stealth or illusions.
In some fanfictions, Shisui's Sharingan has a different color or pattern. This is a simple but effective way to make it stand out. For example, it could be a deeper red or have an extra swirl in the pattern.
Shisui lost his eye due to a complex and treacherous plot. Some powerful forces were after his unique abilities, and he was betrayed by those he trusted.
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.
Well, if Shisui gives Naruto his Sharingan in the fanfiction, Naruto's perception abilities would likely skyrocket. The Sharingan can see the flow of chakra, so Naruto could detect enemies more easily. He might also be able to copy some jutsus more effectively, just like Sasuke and Kakashi can with their Sharingan. However, Naruto would have to learn to control this new power as it might conflict with his own natural chakra control methods.
It would likely expand his Ninja Way. Naruto's Ninja Way is about protecting his friends and the village. With Shisui's Sharingan, he could protect them in more ways. He could use the Sharingan's perception abilities to detect threats earlier and act accordingly.
In some fanfictions, Naruto might awaken his Rinnegan through a powerful and ancient jutsu. For example, he could come across a hidden scroll that contains the knowledge and power to unlock this dojutsu. Maybe a mysterious sage or an old shinobi reveals the secret to him, guiding him through a series of trials that eventually lead to the awakening of the Rinnegan.
Yes, Sarada awakens Mangekyou Sharingan. The manga builds up to this moment with a series of intense battles and character developments that lead to this power awakening.
In fanfiction, Shisui's Sharingan often has some unique abilities. It's usually depicted as having powerful genjutsu - related powers. For example, it might be able to cast illusions on multiple opponents at once with greater ease compared to a normal Sharingan. His Sharingan can also potentially be used to transfer memories in more creative ways in fan stories, like not just the basic memory transfer we saw in the original Naruto series but perhaps more complex emotional and skill - based memories.
In this kind of fanfiction, Naruto might obtain Shisui's brother's Sharingan through some unforeseen events. Maybe Shisui's brother sacrifices himself and entrusts his Sharingan to Naruto. As for new abilities, it could enhance Naruto's perception skills like being able to see through genjutsu more easily and also improve his combat awareness in battles.