There are several common themes. Firstly, the idea of training and growth. Writers might show Naruto training with Goku to become stronger. Secondly, the theme of protecting the world or universe. Since both series deal with threats to their respective worlds, in fanfiction, they often come together to face a greater threat. Also, the theme of rivalry can be seen, where characters from both series compete to see who is stronger in different aspects, whether it's in a fight or in mastering a new skill.
One common theme is the exploration of different power systems. For instance, how would the Chakra in Naruto compare to the Ki in Dragon Ball Z? There are also themes related to epic battles. Fans like to write about Naruto and Goku fighting side by side against a powerful villain. Additionally, the idea of cultural exchange between the two fictional universes, like the ninja culture and the Saiyan culture, is a frequent theme in such fanfiction.
Friendship is also a big theme. Even though it's a harem fanfiction, the bonds between characters from both series are explored. They might team up to face a common enemy or help each other out in personal matters. It's like how in the original shows, friendship was always important. In these fanfictions, it can be even more complex with the harem dynamic added.
Cultural clash is another common theme. The ninja world of Naruto and the more sci - fi/fantasy world of Dragon Ball Z have different values and ways of life. In these fanfictions, the fem Naruto has to bridge that gap. For instance, the way she approaches battles or how she views honor can be very different from the Dragon Ball Z characters, and this creates interesting storylines as they all interact in the harem environment.
One common theme is power - up. Just like in the original series, in the fanfics, characters from both Naruto and Dragon Ball Z often find new ways to increase their power. For example, Naruto might learn to use ki or a Dragon Ball Z character might learn some ninja techniques.
One common theme is the exploration of Saiyan biology. Since Saiyans are carnivores, fanfictions often delve into how this affects their growth, strength, and overall lifestyle. For instance, how their diet might be different during intense training periods.
A common theme is the crossover of powers. Since Ash has his Pokemon abilities and the Dragon Ball Z characters have their ki powers. Another theme is friendship, as both series value strong bonds between characters. So, in fanfiction, you often see Ash forming new friendships with Goku and others.
One common theme is Marron's growth as a character. Fans often like to write about how she becomes stronger, more confident, and independent.
Power is a common theme. Since Beerus is extremely powerful, many fanfictions explore his power, how he got it, and how he uses it. Another theme is his relationship with other characters, like Goku. Some fanfictions also focus on his role as a God of Destruction, the responsibilities and the consequences of his actions.
One common theme is the characters in a highschool setting while still having their Dragon Ball Z powers. For example, Goku might be a student who has to hide his Saiyan strength from his classmates.
Another theme is his relationships. This can include his friendships with other characters from the Dragon Ball Z universe. For example, how he interacts with Goku or Vegeta, and how those relationships develop over time. Some fanfictions also explore possible romantic relationships for Shallot.
In 'Dragon Ball Z Harem Fanfiction', a common theme is the integration of different species. Since Dragon Ball Z has a wide variety of species like Saiyans, Namekians, etc., the harem often consists of characters from different species. This leads to themes of acceptance and understanding among the characters. Another theme is the role of friendship within the harem. Even though it's a harem, the characters also form strong friendships with each other. And, the theme of rivalry can also be seen. Sometimes, the female characters in the harem may be rivals for the attention of the male lead, which adds drama and tension to the story.