Another theme is friendship and teamwork across different universes. When Percy teams up with characters from other fictional worlds, they have to learn to trust and work together. This shows how different characters with diverse backgrounds can come together for a common goal, like saving both their own worlds and the ones they've crossed over into.
Another theme is the idea of a shared threat. Since both Percy and Harry are heroes in their own right, a lot of crossover fics will have them face a danger that neither could handle alone. This could be a new dark force that combines the worst of the magical and demigod worlds, like a villain who can use both dark magic and the power of the Titans. It makes for some exciting plotlines as they have to learn to work together.
One common theme is identity. Since Percy is reincarnated in a different setting, he often has to figure out who he is in this new life. Another theme is adaptation. He has to adapt to new rules, powers, and cultures in the crossover world. For example, if he's reincarnated into a world with different magic systems, he has to learn how to use them.
Conflict is a very common theme as well. There are often conflicts between Percy and the new characters he meets, either because of misunderstandings or because they have different goals. And there's also the overarching conflict of Percy trying to find a way back home or to reverse his banishment. This conflict drives the plot forward and keeps the story exciting.
One common theme is the clash of different worlds. For example, when Percy crosses over to a different fictional universe, his demigod nature might be at odds with the new world's rules or powers. This creates tension not only in the action scenes but also in the romantic relationships. Another theme is the discovery of new selves. As Percy or other characters interact with new love interests from different realms, they often learn more about themselves and grow as individuals.
Friendship and teamwork also play a big role. Percy is used to working with other demigods, but in the Destiny crossover, he has to form new alliances with Guardians. These relationships are often explored, like how they overcome their differences in beliefs and fighting styles to work towards a common goal, such as saving both their worlds from a shared threat.
Another theme is power combination. Since Naruto has chakra - based powers and the demigods in Percy Jackson have their own divine powers, fanfictions often explore how the fem Naruto character combines her ninja skills with the demigod powers she may acquire or encounter. For example, using shadow clones along with some sort of demigod - related magic.
One common theme is friendship. Despite the harem aspect, the relationships often start as friendships. Another theme is adventure. Just like in the original Percy Jackson series, the fanfictions usually involve quests and battles.
One common theme is adventure. Since the Valerian universe is full of exciting and unknown elements, when crossed with other universes, it often leads to epic adventures. For example, a crossover with a space - opera like Star Trek could result in a story where Valerian and his companions explore new galaxies together with the Star Trek crew.
One common theme is the clash of different powers. For example, when the Incredibles cross with other superhero groups, there's always the exploration of how their powers compare and contrast.
Power struggle is a common theme. Starscream is often power - hungry in the original Transformers series, and in crossovers, this trait is magnified when he enters new universes with different power hierarchies. For example, in a crossover with the Lord of the Rings, he might try to claim the One Ring to gain ultimate power.