One idea could be a story where Goku and Turles are forced to team up against a new, even greater threat to the universe. They start off distrusting each other due to their past but gradually learn to work together and respect one another's strength.
A time - travel based 'Goku x Turles fanfiction' could be interesting. Turles travels back in time to before Goku was sent to Earth and tries to change his own fate by befriending Goku early on. This would involve a lot of changes to the original Dragon Ball storyline and show how their relationship could develop in a different timeline.
Perhaps in a different universe, Turles and Goku are brothers. They grow up together, training side by side, but then a prophecy divides them as they are told one must defeat the other for the greater good. This creates a complex relationship full of love, rivalry, and moral dilemmas.
Maybe a fanfic where Goku discovers Turles has a different side to him. Turles could be in a situation where he has to protect something or someone innocent, which makes Goku see him in a new light. They then have to work together to keep this innocent thing safe from other villains in the Dragon Ball universe.
One possible plot could be Goku and Turles forced to team up against a new, powerful enemy. Maybe a villain from another dimension that threatens both their home planets. This would force them to put aside their differences and combine their unique fighting styles.
Well, obviously Turles and Goku are the main characters. Turles is often depicted as the villain in the original story, but in fanfiction, he can be portrayed in different lights. Goku, on the other hand, is the hero. Their interactions and the development of their relationship form the core of the fanfiction.
One idea could be that Goku and Goku Black are forced to team up against an even greater threat from another universe. They start to understand each other's fighting styles during the battle and gradually develop a grudging respect for one another.
Perhaps a story where Caulifla and Goku are on a mission together in an unknown planet. They face various challenges and have to rely on each other's strengths. Caulifla might initially be overconfident, but Goku's experience helps her to understand the importance of strategy and teamwork. Along the way, they start to respect each other more deeply.
One idea could be that Goku and Android 21 team up to face a new and extremely powerful villain. This villain could be from another dimension and has the power to corrupt the minds of other fighters. Goku, with his pure heart and Android 21's intelligence, find a way to defeat the villain.
First, think about the basic plot. Decide if it's going to be an adventure, a character - study, or something else. For example, if it's an adventure, figure out what kind of adventure they'll go on.
Their relationship could develop through mutual respect for each other's strength. Goku, being the pure - hearted Saiyan he is, might start to see that Turles has potential for good deep down. Turles, on the other hand, could be in awe of Goku's power and gradually change his view of Goku from an enemy to a rival and perhaps even a friend.
Maybe a fanfiction where in an alternate universe, Goku, Chichi and Vegeta are part of a special council that governs the Saiyan race. They have to deal with political issues as well as threats from outside forces. This would explore their different personalities in a new context. Goku's laid - back nature, Chichi's strong - willed attitude and Vegeta's pride all play a role in the decision - making process.