In a 'Goku Black Turns Good' fanfiction, he could be influenced by the relationships he forms with the good guys. For example, if he spends time with Goku and his friends, he might start to see their point of view. He could also have a change of heart if he discovers a greater threat that requires him to team up with the heroes to save the universe.
One possible plot could be that Goku Black starts to have doubts about his evil actions after experiencing some self - reflection. Maybe he witnesses an act of great kindness that makes him question his motives.
It could lead to a really interesting plot twist. Maybe he realizes the error of his ways and decides to use his power for good.
Obviously, Goku Black himself is the key character as the story revolves around his transformation. Goku would also be important as he could be the one who shows Goku Black the path of good, either directly or indirectly.
The plot could involve Goku and Goku Black fusing accidentally. Maybe due to some strange energy anomaly. And then they have to figure out how to control this new form. They might initially be feared by their friends because of Goku Black's reputation, but then they prove that they are on the side of good by using their new powers to protect the Earth from an impending threat that no one else could handle.
Well, perhaps in this fanfiction, Goku Black makes a fatal mistake. He could underestimate Goku's ability to adapt during battle. Goku, being the experienced fighter he is, notices this weakness and uses it against Goku Black. He might use a combination of his signature moves like the Kamehameha in a new and unexpected way that catches Goku Black off - guard, leading to his defeat.
Well, one possible plot could be that Goku, as a girl, has to face different challenges in the martial arts world. Maybe the other fighters underestimate her at first, but she quickly proves them wrong with her incredible strength and skills. She might also have to deal with new emotions and how others perceive her femininity in the context of being a powerful fighter.
One possible plot could be that when Goku and Goku Black fuse, they create a being with an incredibly powerful mix of Goku's pure heart and Goku Black's dark power. This new being might initially struggle with the conflicting natures within. They could then face an even greater threat than before, like a new, super - powerful villain that neither Goku nor Goku Black could have defeated alone. As the fused being, they have to learn to control their power and find a balance between good and evil within themselves to defeat this new enemy.
In the fanfic, perhaps Goku's transformation into a girl is the result of a magical spell. As a girl, she might start to see the world from a different perspective. She could be more in touch with her emotions and this could either enhance or hinder her fighting abilities. For instance, she might be more empathetic towards her enemies, which could lead to some interesting moral dilemmas during fights. Her training regime might also change as she adapts to her new body.
Well, perhaps it could be about Izuku learning Goku Black's unique combat styles and techniques. Maybe Goku Black would push Izuku to his limits in training, helping him gain new powers and a more ruthless edge in battle.
A plot could involve Goku Black arriving in the Naruto world during a time of great unrest, like when the Akatsuki is causing chaos. He sees the shinobi as weaklings compared to his Saiyan strength. However, Naruto, with his Sage Mode and Nine - Tails chakra, manages to hold his ground against Goku Black in a first encounter. This catches Goku Black's attention, and he decides to study these 'new' powers. Meanwhile, the shinobi villages must decide whether to see Goku Black as a potential threat or an opportunity to learn from his power. Eventually, they could team up to fight a greater evil that emerges due to Goku Black's presence in their world.
Well, it could be about Goku Jr learning some of Goku's most powerful moves. Maybe Goku teaches him the Kamehameha. They might also go on an adventure together, like fighting a new and powerful enemy that neither could face alone.