There's also the possibility that it was an accident involving a time - traveling character. Perhaps someone from the future came back in time and accidentally caused Frieza's pregnancy through some unforeseen interaction. This would open up a whole can of worms in terms of time - travel paradoxes and how it affects the future of the 'Dragon Ball' universe.
Then, introduce some shared experiences. Maybe they get trapped in a strange dimension together. In this new and dangerous place, they have to rely on each other's strengths. Goku's physical power and Frieza's cunning could be the keys to their survival. As they go through these experiences, they start to see each other in a new light and their relationship begins to change.
Frieza's victims in the manga included many powerful fighters. For instance, he eliminated Dende. His actions were driven by his cruel and power-hungry nature.
Frieza turning good in fanfiction would be a major game-changer. It might involve a character arc where he realizes the error of his ways and strives to make amends, adding depth and complexity to his persona.
The combination of Frieza, a character from a very different universe, with the RWBY setting makes it unique. RWBY has its own set of rules, powers, and characters. When you introduce Frieza, who has his own brand of power and villainy, it creates a whole new dynamic. For example, his ability to transform and his extreme power level contrast with the more gradually developed powers in RWBY.
There's a fanfic where Frieza arrives in the RWBY world and tries to take over. He starts by sizing up the Huntsmen and Huntresses as potential threats or pawns. In this fic, the author does a great job of showing how Frieza's cold and calculating nature clashes with the more idealistic characters in RWBY. It's a really engaging read if you like that sort of crossover concept.
Well, one possible plot could be about how Frieza deals with the physical and emotional changes. Maybe he has to hide his pregnancy from his enemies as it could be seen as a sign of weakness. He might also struggle with the idea of becoming a parent, considering his usually evil and self - centered nature.
One great 'Dragon Ball Frieza Fanfiction' is 'Frieza's Redemption'. It explores a different side of Frieza where he tries to atone for his past sins. It's interesting to see how the author develops his character in a new way, away from his typical villainous role.