The plot might involve Izuku being transported to a world where Goku Black exists. Goku Black, seeing potential in Izuku, decides to train him. During the training, Izuku could struggle with adapting to Goku Black's dark - themed power - up methods. But as time goes on, he starts to combine his own heroic values with the new skills he's learned, leading to a new and improved fighting style.
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.
In this fanfiction, it could be that Goku Black trains Izuku to face a common enemy. Izuku, who is used to his own set of rules and training from his world, has to unlearn some things and learn Goku Black's way. Goku Black might teach Izuku about ki control and some of his signature attacks. Izuku, in turn, could bring his strategic thinking and determination to the training, creating an interesting dynamic between the two characters as they work towards a common goal.
Another possibility is that in the world where Goku Black comes from, there is an enemy who follows Goku Black to Izuku's world. This enemy could be a powerful Saiyan or a being with a dark ki similar to Goku Black. They might see Izuku as a weakness in Goku Black's plan and try to eliminate him first, making them the main antagonist in the fanfiction.
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.
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.
It could be that the story focuses on how Izuku's character changes under Batman's training. Batman might teach him about the importance of preparation and having a backup plan. Izuku, on the other hand, could teach Batman about the power of hope and believing in oneself unconditionally. The fanfiction could also explore how Izuku uses the skills he learned from Batman in his own world, against villains like All for One, in a completely new and unexpected way.
In the fanfiction, perhaps Stain trains Izuku because he believes Izuku has the purity of heart to use power in a way that Stain deems correct. Stain could teach Izuku how to analyze opponents better, which would enhance Izuku's ability to strategize in battles. Izuku might then start to question the current hero ranking system during his training. He could grow to be a hero who is more focused on the essence of heroism rather than just fame and recognition, which would make him stand out among his peers and also cause some friction with the more traditional heroes and hero agencies.
If Naruto were trained by Goku Black in fanfiction, it would be a wild combination. Goku Black is from a different universe with different power systems. He could introduce Naruto to concepts like ki, which might blend with Naruto's chakra in interesting ways. Naruto's physical abilities would likely skyrocket, and his combat strategies would be completely revolutionized. He might start using more acrobatic and flashy moves, like Goku Black does.
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.
Well, Goku's training is intense. It might involve extreme physical conditioning like his gravity training. Naruto could be pushed to his limits in terms of strength and speed. He'd probably learn about ki control, which is different from chakra but could enhance his abilities. Goku might also teach Naruto about the importance of a strong mental state during battle, something Naruto already has a bit of but could be refined.
One possibility could be that Arcturus Black imparts unique magical skills to Harry Potter. Maybe he teaches Harry some ancient and powerful spells that are not commonly known at Hogwarts. This could give Harry an edge in his battles against Voldemort and his Death Eaters.