Well, I've come across a few. Some explore Goku Black's relationship with Goten in really unique ways. For example, there are stories where Goku Black has a change of heart due to his interactions with Goten. It's really fascinating to see how different authors play with their characters' personalities and the overall Dragon Ball universe in these fanfictions.
One common theme is redemption. Goku Black, being a villain, might find redemption through his connection with Goten. Another theme could be power dynamics, as Goten has his own set of powers and how they compare or interact with Goku Black's is interesting to explore.
There might be a fanfiction where Goten gets lost in time, and Goku has to travel through different eras to find him. Along the way, Goku meets versions of his friends from different time periods and has to team up with them to rescue Goten. This would involve a lot of action and emotional reunions.
One great fanfiction is 'Goku and Goten's Training Days'. It focuses on Goku teaching Goten new techniques. It's really exciting as it shows their father - son bond through the training sessions.
You can try websites like FanFiction.net. It has a large collection of fan - made stories, and you can easily search for Goku and Goten fanfiction there. Just type in their names in the search bar, and you'll get a bunch of results.
Some popular themes in Goku and Goten fanfiction could be their training adventures. They might face new and powerful enemies together and have to develop new techniques to defeat them. Another theme could be family bonding. Since they are father - son, there could be stories exploring how Goku passes on his Saiyan heritage and values to Goten.
Another possible main character could be the villain that forces the two Gokus to meet. This villain could be a new, super - powerful threat that the two Gokus need to deal with. Their meeting becomes a crucial part of the story to defeat this powerful foe.
Another plotline might involve Bardock's spirit or some sort of time - distorted encounter. Goten could be in a battle or a difficult situation and receive guidance from Bardock's spirit. This could lead to Goten unlocking new powers or a new understanding of his Saiyan roots as he has this unique interaction with his long - lost ancestor.
They also develop their characters through their relationships. Goku has a unique relationship with Goten as his father. Writers might show Goku being a bit more laid - back as a dad compared to how he was with Gohan. Goten, in turn, might be shown as eager to please his father and live up to the family name. Additionally, in battle situations, their different fighting styles can further develop their characters. Goku's more experienced and instinctive style, while Goten is still learning and may be more impulsive.