He could obtain it through a powerful curse. For instance, a long - forgotten enemy places a curse on Naruto that not only gives him the blue Rinnegan but also sets him on a path to either destroy the world or save it depending on how he uses the power.
Another possibility is that it's a result of some strange chakra experiment gone wrong (or right). Scientists in the Naruto universe are always dabbling in chakra research. Maybe an experiment meant to enhance her natural abilities instead gives her the Rinnegan, and she then has to learn to control it quickly to avoid being consumed by its power.
The plot could involve Naruto being sent to an alternate dimension where the blue Rinnegan is a common power among a group of powerful beings. There, he has to learn to use his blue Rinnegan to survive and also to find a way back home. Along the way, he meets different characters who teach him unique ways to harness the power of the blue Rinnegan, and he returns to his world with new skills and knowledge.
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.
Yes, there are likely to be 'harry has the rinnegan' fanfictions out there. The idea of combining elements from different fictional universes, like Harry Potter and Naruto (where the Rinnegan comes from), is a popular concept in fanfiction. Writers often like to experiment with giving characters from one world the powers or traits of another.
I would recommend 'Naruto's Rinnegan Adventure'. It's a story that delves deep into the implications of Naruto having the Rinnegan. It explores how it affects his relationships with his friends, his standing in the ninja world, and his own understanding of his place in the grand scheme of things. The story is well - written and keeps you hooked from start to finish.
In a fanfiction where Naruto secretly has the Rinnegan, he would become an even more formidable force. His combat abilities would skyrocket. He could potentially use the powers of the Rinnegan, like the Six Paths techniques, in addition to his existing Sage Mode and Nine - Tails chakra. This would make him a major threat to any enemy. He might be able to travel between dimensions more easily and have better control over life and death, just like Madara and Sasuke did with their Rinnegan.
One possible plot could be that Naruto discovers a hidden power within himself that transforms his Rinnegan into the Eternal Rinnegan. Then he has to learn to control this new power quickly as a new and powerful enemy emerges. He uses his new - found power to protect the village and his friends.
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.
Well, it could make Naruto extremely powerful right from the start. With the Rinnegan, he might be able to master all types of jutsu more quickly. He could also have an edge in battles against powerful foes like Madara or Kaguya. Maybe he'd be able to use the six paths techniques with more ease and less training.