One common theme is power combination. Since Jojo has such unique stand abilities, when crossed over with other universes, seeing how those stands interact with different powers like magic or superhuman abilities from other shows is always interesting.
Well, for 'jojo's bizarre adventure crossover fanfiction', a crossover with 'One Piece' could be great. Picture the Straw Hat Pirates meeting the Joestar family. They could have adventures together on the Grand Line and in the JoJo universe. Also, a crossover with 'Naruto' would be interesting. Ninja techniques and Stands could clash or work together. And how about a crossover with 'Bleach'? Soul Reapers and Stand users could face off against powerful Hollows and villains from the JoJo world.
First, you need to choose the two universes you want to cross over. For example, if it's Jojo and 'Sword Art Online', study the rules and characters of both. Then, create a plot that makes sense for both worlds to collide. Maybe a Stand user gets trapped in the SAO virtual world. Next, think about how the characters will interact. Will they be friends or foes? Start writing with a strong opening that grabs the reader's attention, like a Stand suddenly appearing in the middle of a SAO boss fight.
The combination of unique powers. X - Men have mutant powers like telepathy, super strength, and flight, while Jojo characters have their 'Stands' with various abilities. When these powers interact in a fanfic, it creates exciting scenarios.
One idea could be a crossover with another popular anime like Naruto. The JoJo characters could be transported to the Naruto world and have to deal with things like chakra and ninja techniques. They might use their stands in unique ways to combat the ninja threats. For example, Star Platinum could be used to quickly dodge and counter attacks from ninjas. Another plot could involve a crossover with the Fate series. The JoJo characters could be summoned as servants, and their stands could be seen as a form of their special abilities in this new context. This would create an interesting dynamic as they fight in the Holy Grail War.
Use less - known characters from both universes in the crossover. For example, instead of always using the main JoJo characters, pick some of the more obscure ones and pair them with less popular characters from the other universe you're crossing over with. This will give a fresh perspective.
Once upon a time in the world of Jojo, Jonathan Joestar was on a quest. He had to face the evil Dio. One night, as he was resting in an old, spooky mansion during his journey, he heard strange noises. But he wasn't afraid. He knew his Hamon powers would protect him. He got up, and with his brave heart, he explored the mansion. In the end, he found out it was just a stray cat that had made all the noise.
Well, the 'jojo's bizarre adventure novel' has a really complex plot. It spans generations of the Joestar family. There are different arcs, like the one where Dio Brando is a major villain. He has his own evil plans which often put the Joestars in great danger. And the characters keep evolving and facing new challenges in different locations around the world.