Yes, there are likely many Naruto fanfictions where a character has the ultimate Sharingan. You can check popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for relevant keywords like 'Naruto', 'ultimate Sharingan' to find them.
One possible plot could be that Naruto discovers he has the ultimate Sharingan through some mysterious means. Maybe it was a hidden power passed down in his family that was dormant until a certain event triggered it. Then he has to learn to control this new power while still using his own unique ninja skills.
Yes, there are likely some Naruto fanfictions out there where Naruto has a blue Sharingan. Fanfiction writers often come up with creative and unique ideas like this. They might explore how Naruto's character would be different with this new ability, or how it would change the existing storylines in the Naruto universe.
One drawback could be the strain on his body. The Sharingan is a powerful dojutsu, and Naruto's body, which is used to his own chakra system, might not be able to handle it well at first. This could lead to fatigue and over - exertion during battles.
There could be. Fanfiction often takes creative liberties. Since Naruto is known for his own abilities and the Sharingan is a significant power in the series, a story where Naruto has a golden Sharingan could be an interesting twist. It might explore new plotlines, power dynamics, and character relationships. Check websites like FanFiction.net or Archive of Our Own to look for it.
It could be Sasuke. Since the fanfic has 'Sharingan' in the title, Sasuke, who is well - known for his Sharingan abilities in the original Naruto series, might be one of the main characters.
Well, it could have the ability to time - travel. Imagine Naruto using it to go back in time to prevent some of the great tragedies in the Naruto world, like the Uchiha massacre. This would change the whole storyline in a very interesting way.
In fanfiction, the idea of Naruto having the Sharingan and Rinnegan is often a creative and out - of - the - box concept. It could be due to some kind of powerful jutsu or a unique plot device. Maybe a powerful enemy uses a forbidden jutsu that somehow transfers the powers to Naruto. Another possibility is that in an alternate universe created by the fanfic writer, the rules of chakra and kekkei genkai are different, allowing Naruto to possess these powers.
In this fanfic, perhaps there is a concept of the Sharingan evolving in ways that are completely different from what we know. It could be that the Sharingan has the ability to absorb not just jutsu, but also the life force of opponents, which would create a whole new dynamic in battles and power struggles within the Naruto universe.
It could be an evil ninja who also has a powerful form of the Sharingan. He might be jealous of Naruto's new ultimate Sharingan and wants to take it for himself. This antagonist could use his Sharingan powers to create illusions that are so powerful, even Naruto has a hard time breaking free from them.