Superpowers and science - fiction elements are likely to be themes as well. Johnny has his own set of adventures often related to his sister's inventions, and Buttercup has her superpowers. Fanfiction could explore how these elements interact when the two characters are brought together, like perhaps using science to enhance or counteract superpowers.
Some dedicated cartoon fanfiction forums might also be a good place to search. These often have a community of fans who write and share their Johnny Test and Buttercup fanfiction. Check out places where fans of the shows gather to discuss and exchange their creative works.
One common theme is identity. Johnny has to figure out who he is now as a girl. Another theme is family reactions. His family has to deal with this new version of Johnny, and it often leads to comical or heartwarming moments. For example, in some fanfics, his dad is completely clueless at first.
A common theme is the transformation of Johnny into a vampire. It often explores how he deals with his new powers and the changes in his relationships, like with his sisters. Another theme could be the conflict between vampires and humans in the Johnny Test universe.
Adventure is also a big theme. Since Johnny is always getting into some sort of trouble or on a new quest, the OC gets dragged along. This can range from exploring strange places in their town to dealing with wacky inventions gone wrong.
Well, in this kind of fanfiction, a common theme might be the conflict between family expectations and their own feelings. The sisters in Johnny Test are part of a family, and having a romantic relationship between them would likely go against what their family would expect. Also, the theme of acceptance, both from themselves and potentially from others if their relationship were to be known, could be prevalent. It's about how they handle the situation in a world where such a relationship is not the norm. Additionally, there could be a theme of growth as they learn to understand their emotions better through this experience.
One common theme could be the changes in Buttercup's character due to pregnancy, like becoming more protective or vulnerable. Another might be the reactions of the other characters in the story towards her pregnancy.
One common theme is friendship. Since ace and buttercup are characters, their relationship can be explored in terms of how they become friends, support each other through various situations. Another theme could be adventure. They might go on adventures together and face different challenges.
Often, his sisters might play a role in the 'hurt' scenarios. Maybe they accidentally contribute to Johnny getting hurt while trying to stop one of his wild schemes. Another element could be the reactions of his family and friends to his injuries, which can add emotional depth to the story.
Well, a theme that can't be ignored is the theme of family. Johnny has his own family in the original show, and Gill could be incorporated into that family dynamic in interesting ways in fanfiction. Maybe Gill becomes like a part of the family and they all have to adjust to his presence. There could be heartwarming and funny stories around this theme.
One common theme could be the exploration of their different personalities. Buttercup is tough and feisty, while Butch is also rough - around - the - edges. Their interactions based on these personalities, like a sort of 'opposites attract' situation, are often explored. For example, in some fanfictions, they might start off as rivals and then develop feelings for each other.