Sure. Some female Jonathan Joestar fanfictions might explore how the character would be different if she were female in the context of the original story's events. For example, how would her relationships with Dio or other characters change? Check out fanfiction.net as well, as it has a wide range of such works.
One popular crossover is with the Fate series. Combining the unique abilities in the Fate universe with Jonathan Joestar's Hamon powers can create really interesting storylines.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfictions, and you can use the search function to specifically look for female Jonathan Joestar fanfictions. Just type in the relevant keywords and browse through the results.
One popular Jonathan Joestar crossover fanfiction is 'Jonathan Joestar in the World of Harry Potter'. It's really interesting to see how Jonathan's noble and brave character would interact with the magical world of Hogwarts. He might use his Hamon skills in some unique ways within that universe.
Another place to look is FanFiction.net. There are many fans who post their Jonathan Joestar crossover fanfics there. However, the quality may vary, so you might need to read the reviews or summaries first to find the good ones.
The meeting might be shown in a rather dramatic way. For instance, Jonathan could appear in a flash of light or some other supernatural occurrence. His descendants, initially shocked, would then start asking him all sorts of questions about the past, his adventures, and his powers. The author could use detailed descriptions of their expressions and body language to convey the intensity of the moment.
In fanfiction, when Jonathan Joestar meets his descendants, it could be a very emotional encounter. He might be proud to see how they've carried on his legacy, perhaps in the way they fight or their sense of justice. His descendants could also learn a great deal from him directly, like combat skills or the true meaning of honor.
Well, one really creative idea is a crossover with 'Alice in Wonderland'. Imagine Jonathan falling down the rabbit hole and dealing with the strange creatures there using his Hamon. It's a really out - there concept that combines two very different worlds.
It depends on the specific publisher and the official stance. Sometimes it might be canon, but other times it could be more of a side story or alternate take.
The exploration of different cultures is also common. The Naruto world has its own ninja clans and cultures, and the Joestar world has its own unique settings. Fanfiction writers often explore how these two different cultural aspects can co - exist or influence each other, creating a rich and diverse narrative environment.