One common theme could be the power dynamic between Goku and Kefla. Since they are both very powerful characters in the Dragon Ball universe, exploring how their powers interact and complement each other might be a theme. For example, in battles or training sessions.
I'm not sure about a specific 'goku x kefla fanfic' to recommend. You could try searching on fanfiction websites like Archive of Our Own or FanFiction.net. There might be some interesting ones there.
One common theme is the exploration of their power dynamics. Since both are powerful characters, fanfics often show how they compare and contrast in terms of strength. Another theme is the idea of mutual respect. They come from different backgrounds, and the fanfics usually depict how they learn to respect each other's values and abilities. Also, the theme of growth in their relationship is quite common. Starting from initial misunderstandings or indifference, they grow closer over time.
Another theme could be cultural differences. Naruto is from a ninja - based culture in the Hidden Leaf Village, while Kefla is from the Dragon Ball universe with its own set of values and ways of life. Fanfics might play with how they deal with these differences when they meet. It could lead to some humorous or thought - provoking situations. For instance, Naruto might be amazed by the technology in the Dragon Ball world, or Kefla could be intrigued by the ninja techniques.
The theme of love against all odds is also quite prevalent. Given their different origins and the fact that Goku is already married in the original story, their relationship in fanfics has to overcome many obstacles. This could be social, moral or even physical (like dealing with other powerful characters who oppose their union), but they still find a way to be together, which makes for an interesting read.
One common theme is power combination. Since both are powerful characters in the Dragon Ball series, many fanfictions explore how their powers could combine or complement each other in battles.
One common theme is power dynamics. Since both Gohan and Kefla are powerful characters in the Dragon Ball universe, their relationship might be explored in the context of who is stronger or how they combine their powers. Another theme could be cultural differences, as Gohan is from Earth and Kefla is a fusion from the Saiyan race in Universe 6.
Another theme is power transfer or inheritance. Some fanfics might have Bardock passing on some hidden power or knowledge to Goku. This could be related to their Saiyan abilities or some special technique that only their family line can access. There is also the theme of redemption in some cases. If Bardock is brought back in a fanfic, he may seek to atone for his past actions through his relationship with Goku.
One common theme is the discovery of love. Goku, being somewhat naive in matters of the heart, gradually realizes his feelings for Launch. Another theme is adventure. They often go on quests together, which strengthens their bond.
One common theme is rivalry - turned - friendship. Their long - standing rivalry in the original series is often explored in fanfics as a starting point that then evolves into a deeper connection.
One common theme is redemption. Since Broly is often portrayed as a villain initially, many fanfics focus on his journey towards redemption with Goku's help. For example, Goku might show Broly a different way of using his power, leading Broly to change his ways.