A good fanfic in this context should have a strong understanding of the characters. For Naruto, it should capture his determination and growth during the Chunin Exams. Jiraiya should be depicted as the wise and somewhat eccentric mentor. The plot should also fit well within the world of the Chunin Exams, with exciting battles and challenges.
In such a fanfic, one possible scenario could be that Jiraiya decides to secretly train Naruto during the Chunin Exams. He might teach Naruto some new and powerful jutsu that Naruto then uses to surprise his opponents in the exams. This could lead to Naruto standing out even more and attracting both admiration and envy from other participants.
Well, a fanfic could be centered around the Chunin Exams and the relationship between Naruto and Temari. Maybe they start off as rivals, with Temari being skeptical of Naruto's abilities. But as the exams progress, Naruto shows his growth and power, especially during his fight with Neji. Temari then sees him in a new light and they end up working together against a common enemy during the later stages of the exams, forging a friendship that could potentially turn into something more in the future.
Yes, there might be such fanfics out there. Fanfic writers often explore alternative storylines, and this would be a very dark and unexpected twist to the original Naruto story. It goes against the strong bond and rivalry that Naruto and Sasuke have in the canon, but that's the allure of fanfiction - to see what could happen if things took a drastically different turn.
Well, it could be about Naruto during the Chunin Exams but with a darker twist. Maybe it focuses on Naruto having to face more sinister opponents or dealing with some kind of internal struggle that's much darker than in the original story during the exams.
One possible fanfic could be about a character with a Godlike Sharingan who completely dominates the Chunin Exams. They might use their Sharingan's advanced abilities, like predicting opponents' moves with extreme precision, to breeze through the written tests and then overpower their opponents in the combat rounds. For example, they could use genjutsu so powerful that their opponents are completely trapped in illusions and can't fight back.
Grimmjow could be seen as a new kind of threat. The Chunin Exams are a test of a ninja's skills, and Grimmjow has skills that are completely different from the ninja arts. His spiritual power could be something that the ninja have never encountered before. So, he could either be a great ally if someone can convince him to work with them, or a terrifying enemy. He could also disrupt the normal flow of the exams as he doesn't care about the rules and regulations set for the ninja.