The plot could take a very different turn. Naruto could use the law to solve disputes between clans. For instance, instead of using force, he could mediate based on legal precedents.
In such a fanfiction, Naruto knowing the laws could lead to a more mature and responsible character. He might use this knowledge to better protect the village and his friends. For example, he could ensure that any actions taken by the village are within the legal framework, preventing unnecessary conflicts with other villages.
One great Naruto fanfiction could be one that focuses on exploring the relationship between Naruto and Sasuke in more depth. It might show their unspoken understanding and how they grow together even after all the hardships.
I'm not entirely sure specifically as it could vary greatly. But generally in a fanfiction where Naruto 'knows' Junsei Tensei, it might involve Naruto having knowledge of a particular reincarnation or rebirth concept related to Junsei Tensei. It could lead to him making different decisions in the Naruto universe based on this knowledge.
In 'naruto knows the hiraishin fanfiction', a frequent theme is friendship. Naruto might use the Hiraishin to quickly reach his friends in need. Also, the theme of legacy is common. As the Hiraishin was Minato's technique, Naruto might be seen as carrying on his father's legacy. Additionally, the theme of mystery can be present as he uncovers more about the technique's origin and potential.
In fanfiction, if Naruto knows all jutsu, it means he has an overwhelming advantage. He could defeat any opponent with ease. For example, against powerful foes like Madara, he wouldn't need to struggle as much. It also changes the power dynamics in the Naruto universe significantly.
Well, in a 'naruto knows edo tensei fanfiction', it could be about Naruto having some special knowledge or encounter related to the Edo Tensei jutsu. Maybe he discovers a new way to counter it or uses it in a unique situation.
Obviously, Naruto is one of the main characters since it's about him knowing the Hiraishin. Kakashi could also be an important character as he has some knowledge of the technique as well. And his friends like Sasuke and Sakura might also be involved, as they often play important roles in Naruto's adventures and could be affected by his use of the Hiraishin.
Naruto's character might become more confident. Since he knows everything, he doesn't have to doubt his decisions as much. He can act quickly and decisively, which is a big change from his impulsive and sometimes self - doubting nature in the original story.