Another idea is a story where Goku and Caulifla are accidentally sent to a strange dimension. In this dimension, they have to rely on each other completely. Caulifla starts to understand Goku's way of thinking more deeply, and Goku respects Caulifla's determination. They work together to find a way back home while also learning new techniques from the strange beings in that dimension.
Maybe a fanfiction where Caulifla develops feelings for Goku during their training sessions. However, Goku, being oblivious as he often is, doesn't notice at first. Caulifla tries to prove herself to Goku by constantly challenging stronger opponents. Their relationship could be a mix of friendship and the start of something more, with a lot of action-packed scenes in between.
One interesting plot idea could be Goku training Caulifla in a new form of Ultra Instinct. This would allow for a deep exploration of their mentor - mentee relationship. Caulifla is already a strong fighter, but with Goku's guidance, she could reach new heights. Another plot could involve them teaming up against a powerful new enemy that neither could defeat alone. They'd have to combine their unique fighting styles and powers to win.
A plot could involve Caulifla being from a parallel universe where she is the only survivor of her race. Goku meets her during a multiverse tournament and decides to help her. As they train and fight side by side, they develop a deep bond that goes beyond friendship and they explore their new relationship while facing various challenges from other universes.
One interesting storyline could be Goku and Android 18 teaming up to fight a new, powerful enemy that neither of them can defeat alone. They have to learn to combine their skills and powers in unique ways.
A more action - packed storyline could be Chichi getting kidnapped by an old enemy of Goku. Goku then has to race against time to save her. Along the way, he might face some new and powerful foes. Goku's determination to save his beloved Chichi would be the driving force of this exciting story.
Caulifla and Goku's relationship in fanfiction could be really interesting. Maybe in this fanfiction, they start as rivals. Caulifla, with her Saiyan pride, wants to prove she's stronger than Goku. But as they fight more, they begin to understand each other's fighting styles and develop a mutual respect. This could lead to some really cool training sessions where they both learn new techniques from one another.
A more emotional storyline could be that Caulifla gets injured badly in a fight. Goku then takes it upon himself to nurse her back to health. During this time, they have deep conversations about their lives, their love for fighting, and their dreams. This could lead to a new level of respect and friendship between them.
They could have a friendly sparring match. Goku is always up for a good fight, and Caulifla would be eager to test her skills against him. It would be a high - energy battle with lots of fast - paced action and cool power - up moments.
There could be a fanfiction where Caulifla teams up with Goku and Vegeta to face an even greater threat than the ones in the original series. This would give her a chance to learn from the two Saiyan legends and show her growth as a warrior. It could also explore her relationships with the other Z - fighters.
Training under Goku would expose them to a whole new level of fighting. They would get to spar with Goku and other Z - Fighters. This would not only improve their physical strength but also their combat strategies. They might even develop new techniques inspired by Goku's fighting style. And they could bring back what they've learned to their own Saiyan race to help it grow stronger.
One popular storyline could be Goku using his smarts to outwit a new and powerful enemy that can't be defeated by brute strength alone. For example, he might figure out the enemy's weakness through careful observation and analysis, much like a detective. Another could be Goku using his intelligence to solve a problem in the Dragon Ball universe that affects all the characters, like a mysterious energy drain. There are also fanfictions where Goku's smart side helps him train his friends more effectively, leading to new power - ups for everyone.