Maybe Sasuke teaches him the Chidori in a moment of camaraderie. And for the Rasengan, it could be an older and wiser Naruto from the future who travels back in time to teach his younger self.
One possible consequence is that he might become more confident earlier. With the Rasengan in his arsenal sooner, he could face opponents more bravely in the early stages of his ninja journey. This newfound power could also make him a target for stronger enemies who see him as a potential threat.
One creative version could be where Naruto learns Rasengan in a dream realm. In this fanfiction, the dream realm has unique chakra rules. He meets a mysterious sage who teaches him a faster way to form the Rasengan. Another could be a time - travel fanfic where Naruto goes back in time and learns Rasengan from his father. It gives a whole new perspective on the jutsu and his family connection. And there could also be a version where Naruto learns Rasengan from an enemy turned ally, which shows his ability to find common ground even with foes.
The key element is Naruto's determination. He has to be really determined to learn both the Rasengan, a powerful chakra - based attack, and the Hiraishin, a complex space - time ninjutsu. Without that strong will, he wouldn't be able to endure the tough training.
It could be Kakashi. Since he's already Naruto's teacher and he knows both techniques. He could guide Naruto in understanding the intricacies of the Chidori, like how to form the lightning - chakra in his hand, and for the Rasengan, he could give more advanced tips on chakra control.
In a fanfiction like this, the plot might involve Naruto struggling to master both techniques. He could start by observing Sasuke use the Chidori and then try to incorporate its lightning - based power into his own jutsu. For the Rasengan, he might have new insights while training, perhaps finding a way to combine it with the Chidori for an even more powerful attack. Along the way, he would face challenges like controlling the chakra flow for both techniques and dealing with opponents who are also after these powerful jutsus.
One popular 'naruto learns rasengan and hiraishin fanfiction' is 'The Path of the Rasengan Master'. In this fic, Naruto's journey to master both techniques is filled with intense training sessions and interesting character interactions. It really delves deep into how Naruto overcomes the difficulties in learning these powerful jutsus.
One possible plot could be that Naruto discovers an ancient scroll that has a simplified version of the Rasengan technique. He spends days secretly practicing it in the forest, facing initial failures but gradually getting the hang of it. With his new - found skill, he surprises his friends and even manages to use it in a sparring match against Sasuke, changing the dynamics of their rivalry early on.
Learning Rasengan in fanfiction can be a turning point for Naruto's character. It can make him more independent. He doesn't have to rely as much on others for protection. His self - belief skyrockets. He starts to see himself as a real ninja. This change in his self - perception can lead to him taking more risks for the greater good. It also might make him more humble in a way. He realizes that with great power comes great responsibility, and he doesn't let the power of Rasengan go to his head.
His training would likely be more focused on perfecting the Rasengan. Instead of spending time on basic jutsu training, he might be pushed to improve the Rasengan's power and speed. For example, he could be taught different ways to combine it with his other skills.