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.
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.
Perhaps Sasuke uses Sakura to get closer to some information. He might know that Sakura has connections or knowledge that can help him in his quest for revenge or for protecting the village. So he uses her in a strategic way while she is initially unaware of his motives. As the story progresses, their relationship could develop in complex ways.
One interesting story could be where Sasuke uses Sakura's medical skills to his advantage during a difficult battle. He might rely on her to heal his wounds quickly so he can continue fighting.
Well, I don't have a particular 'sasuke uses sakura fanfic' at hand. However, when looking for such a fanfic, you should look for Naruto - related fanfic sections. You could also join Naruto fan communities on social media platforms and ask the members if they know of any good ones.
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.
There's a great one called 'Sasuke's Utilization of Sakura'. Here, Sasuke uses Sakura's physical strength. Sakura has trained hard and become quite powerful. Sasuke pairs up with her in battles, and he uses her brute force along with his own skills to defeat enemies that are much stronger than them individually.
In fanfiction, Naruto creating Chidori could be possible through some creative plot devices. Maybe he was taught by Sasuke in an alternate universe where they teamed up earlier. Or perhaps he discovered a scroll that had the knowledge of Chidori and was able to learn it on his own with his determination and quick - learning ability.
In many Naruto fanfictions, the Chidori - Rasengan combo is often portrayed as an extremely powerful and unique move. It combines the piercing nature of the Chidori with the rotational and explosive force of the Rasengan. Some fanfictions might have Naruto or Sasuke (or both in some cases) creating this combo during a crucial battle against a powerful enemy, like a new Akatsuki member or a rogue ninja from another village. This combo is usually described in great detail, with the lightning - chakra of the Chidori surrounding and enhancing the Rasengan, making it not only more destructive but also having an added effect like paralysis due to the electricity.