It could also be a fanfic centered around their friendship. Android 18 might initially be cold towards Bulma, but as time goes on, they start to bond. Bulma could introduce Android 18 to the joys of normal life, like shopping or going to the beach. And Android 18 could protect Bulma from threats that her scientific work sometimes attracts. In the end, they become inseparable friends, changing the way the other characters view Android 18.
They could start off as acquaintances with mutual respect. Bulma respects Android 18's power, and Android 18 respects Bulma's intelligence. As they interact more, they find common interests. For example, they both have a connection to the world of technology in different ways. This could lead to a deeper friendship where they rely on each other for support.
Perhaps the fanfic could be a time - travel story. Android 21 accidentally sends Goku back in time to a point where she was first created. Goku then tries to prevent her from becoming the villain she was meant to be. This would involve Goku having to deal with the scientists who created her and convincing them to take a different path in their research, all while trying to find his way back to his own time.
Well, one possible fanfic could be about Android 18 and Raditz teaming up against a common enemy. Maybe they initially start off as reluctant allies, but as they fight side by side, they begin to respect each other's strength.
They could team up to invent something amazing. Bulma has the brains and Gohan has the power and knowledge of the Saiyan abilities. Maybe they create a new type of energy shield that can protect the whole planet from any kind of attack.
Well, in many Dragon Ball Z fanfics about Vegeta and Bulma, their relationship is a key aspect. Vegeta starts off as this aloof and somewhat arrogant Saiyan. Bulma, on the other hand, is used to getting her way. But as they spend more time together, they start to understand each other better. Vegeta begins to care for Bulma and their family, which is a huge change from his initial self - centered attitude. And Bulma supports Vegeta in his battles, not just as a spectator but as an important part of his life.
Another theme is friendship. Since both Naruto and Dragon Ball Z have strong themes of friendship, when they cross over, the fanfics often explore how Naruto and Bulma can become friends. They come from different worlds but end up having to rely on each other, which is a great way to show the power of friendship across universes. In some fanfics, they also make new friends together from both universes.
Common themes in 'Dragon Ball Z Raditz x Bulma fanfic' often include the clash of their different worlds. Raditz comes from a warrior - based Saiyan culture, and Bulma from a more technologically advanced Earth culture. So there could be a theme of how they learn from each other. Also, themes of love against all odds can be present, as their relationship would be quite unorthodox in the context of the original Dragon Ball Z story.
One possible plot could be that Android 21, with her unique powers, teams up with Goku to face a new and powerful enemy. They might have to combine their strength and fighting techniques to defeat this foe.
One possibility is a story where Vegeta tries to train Android 18. He might see her potential and want to push her to become even stronger. This could lead to some interesting training sessions, with Vegeta's harsh Saiyan training methods clashing with Android 18's more laid - back attitude. However, in the end, she could become a stronger fighter under his guidance.
One possible fanfiction could be about Bulma helping Gohan with his studies. Since Bulma is super smart, she could tutor Gohan in advanced science and technology. This would not only strengthen their friendship but also give Gohan new knowledge that might come in handy during his battles. For example, understanding the principles of energy and mechanics could help him better strategize against his enemies.