If Naruto knew the Chidori in a fanfic, it might lead to some interesting interactions with Sasuke. Since the Chidori was Sasuke's signature move for a long time, Naruto having it could create a sense of rivalry or a new level of mutual respect. They could even train together to improve their use of the Chidori and compare it to Naruto's Rasengan.
Well, in a fanfic scenario where Naruto knows the Chidori, it would likely expand his combat repertoire. He could potentially modify the Chidori with his own unique style, like adding his Wind - style chakra nature to it. This would give the Chidori an added cutting edge, making it more powerful and versatile. It would also be a great shock to his enemies who are used to seeing only Sasuke use this particular jutsu.
In a fanfic where Naruto knows the Chidori, it could change the power dynamics in battles significantly. Naruto's already vast chakra reserves combined with the piercing and fast - acting nature of the Chidori would make him an even more formidable opponent. He could use it in close - quarter combat situations, perhaps integrating it with his Shadow Clone Jutsu in creative ways. For example, he could have clones perform the Chidori from different angles, catching his enemies off - guard.
In a more creative fanfic, an ancient ninja who was the originator of the Chidori technique could appear. This ninja could be brought back to life through some sort of magic or jutsu. He sees Naruto's pure heart and decides to pass on the Chidori knowledge to him, believing Naruto will use it for good.
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.
In the fanfic, Naruto could use the Chidori to save his friends who are trapped by an enemy's powerful jutsu. Since the Chidori is a very fast - moving and piercing attack, he could break through the barriers set up by the enemy. He might also face some internal struggle as using the Chidori goes against his normal style of ninjutsu.
One possible plot could be that Naruto discovers the Chidori technique while training in a secret area. Maybe he stumbles upon some old scrolls left by Kakashi. He then has to train hard to master it, facing difficulties like controlling the lightning chakra. As he progresses, he combines it with his own unique Rasengan, creating a new and powerful jutsu.
It would make him more versatile. He's known for his Rasengan, but using the Chidori would show that he can adapt other powerful techniques. This could make him seem more of a prodigy, as the Chidori is a difficult technique.
He might combine the Chidori with his Sage Mode. In Sage Mode, Naruto has enhanced senses and strength. Adding the Chidori to that would make it an extremely powerful attack. He could use the precise and fast - paced nature of the Chidori while being in Sage Mode, which would give him better accuracy and more power behind the jutsu.
Well, he might start with intense training sessions. Maybe he observes Kakashi closely for the Chidori, and for the Rasengan, he practices over and over again, gradually getting the hang of the chakra control required.
One possible scenario could be that Naruto learns the Chidori from Sasuke in a moment of truce. Sasuke, realizing Naruto's determination to become stronger, decides to teach him this powerful jutsu. Another could be that Naruto discovers a scroll that contains the secrets of the Chidori and through his own hard work and study, he manages to master it. Or perhaps, a new character appears who has knowledge of the Chidori and trains Naruto in it as part of a greater plan to defeat a common enemy.
One consequence could be a shift in his relationships. Sasuke might be both impressed and a bit threatened. Their rivalry could take on a new dimension as Naruto now has a jutsu similar to Sasuke's signature move. Also, the village might view Naruto in a new light, as he's mastered a foreign - seeming jutsu. It could make him seem more versatile and dangerous to enemies.
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.