Well, friendship and rivalry are quite common. Characters from different universes may start as rivals, but as the story progresses, they become friends and learn from each other. For example, Naruto's determination might inspire a character from Ranma 1/2 to be more goal - oriented. Also, the idea of saving the world or a particular universe is often there. Since all three shows have elements of fighting against evil, in a crossover, the characters might team up to face a greater threat that spans across their combined universes. This can lead to some epic battles and heroic moments in the fanfic.
A common theme is also the exploration of different character personalities. Naruto is known for his boisterous and positive personality, Ranma has his own issues with his curse and a more complex relationship with the opposite sex, and Yusuke from YuYu Hakusho is a bit of a delinquent with a good heart. When these characters interact, it can create some interesting dynamics. Some fanfics might focus on how their personalities either clash or complement each other. For instance, a story could show how Naruto's optimism can help Ranma deal with his insecurities, while Yusuke's street - smartness could give them an edge in a tricky situation.
One common theme is the clash of different power systems. In Naruto, there are ninjas with their jutsus, in Ranma 1/2, there's the martial arts and the curse, and in YuYu Hakusho, there are spirit powers. Writers often explore how these powers interact when the characters meet. Another theme could be the cultural differences. Naruto has its own ninja culture, Ranma 1/2 has a more comical Japanese setting, and YuYu Hakusho has a darker, more supernatural world. Seeing how characters adapt to these different cultures is also a common aspect.
Another option is to ask in relevant fan communities. For example, on Reddit, there are subreddits dedicated to Naruto, Ranma 1/2, and YuYu Hakusho. You can post a question asking for good 'naruto ranma yuyu xover fanfic'. The fans there are usually very helpful and can recommend some hidden gems that you might not find through normal searches. They might also be able to give you some tips on what to look for in a good crossover fanfic, like how well the author blends the different power systems from each universe or how they handle the personalities of the various characters.
Friendship is also a big theme. Since both Ranma and Naruto value friendship highly in their original series, in the crossovers, they usually form a strong bond. They learn from each other's strengths and support each other in facing various challenges.
Martial arts battles are also a common theme. Given that the series is centered around martial arts, fanfics will continue this trend. New opponents might be introduced, or different martial arts styles could be explored. It keeps the action part of the story alive.
The mix of different universes. Each of Naruto, Ranma, and Yu Yu Hakusho has its own unique world - building, powers, and character types. When combined in a crossover fanfic, it creates a whole new and exciting dynamic. For instance, the ninjutsu from Naruto, the martial arts and transformation in Ranma, and the spirit energy in Yu Yu Hakusho can lead to really creative storylines.
A common theme could be the witch OC's struggle to fit into the 'Yuyu Hakusho' world. Since it's a different kind of character in that universe.
Love and relationships are also common. Since she has a complex situation, her relationships with other characters, whether it's romantic or platonic, are often explored. For example, how she deals with her feelings for Akane while in her female form.
One common theme is the clash of cultures. Since Ranma comes from a very different world than RWBY, there's often a focus on how his Japanese - influenced upbringing and martial arts background interact with the more Western - inspired RWBY world. For example, his ideas about honor and combat might be different from what the RWBY characters are used to.
One common theme is the clash of cultures. Naruto comes from a world of ninjas with a feudal - like society, while Spider - Man is from a modern, urban New York. So there's often exploration of how their different values and ways of life interact. Another theme is power combination. Fans like to see how Naruto's chakra - based powers and Spider - Man's superhuman abilities can be combined in battles against new and powerful enemies.
In fem Harry is ancient xover fanfic, a prevalent theme is the clash of cultures. Fem Harry comes from a modern - day wizarding world in the Harry Potter series, and when she enters the ancient world, there are bound to be cultural differences. This can lead to interesting situations, like misunderstandings that she has to overcome. Another common theme is the exploration of gender roles. In the ancient world, gender roles might be more rigid compared to her own world, and fem Harry has to navigate through these expectations. Also, the theme of destiny often plays a part, as she may find that she has a special role to play in the ancient world she's been thrust into.
One popular 'naruto ranma yu yu hakusho xover fanfic' could be 'The Crossover Adventure'. It combines the unique elements of each series in an interesting way. The characters from Naruto, Ranma, and Yu Yu Hakusho interact in a new world created by the author. They face new challenges and enemies that are a blend of the threats from their respective original universes.