Goku might teach Naruto about the concept of Super Saiyan forms. Although Naruto doesn't have Saiyan blood, he could learn about the idea of unlocking different power levels through intense emotions and training. For example, Naruto could find a way to apply the idea of Super Saiyan rage - like power - ups when he's in a really tough battle and needs that extra boost.
A plot could involve a tournament where fighters from both universes participate. Goku enters because he loves a good fight, and Naruto joins to prove himself outside of the ninja world. At first, there's some misunderstanding between the two groups, but Goku and Naruto quickly realize they have a lot in common. They end up fighting side by side against some of the more underhanded competitors. As they progress through the tournament, they learn from each other's techniques and grow stronger. In the final battle, they face off against a super - strong opponent created by an evil wizard who wants to take over both universes.
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.
In a Goku Naruto crossover, both characters have their own strengths. Goku's physical strength and energy attacks are off the charts. His ability to instantly teleport and sense ki gives him an advantage in combat. Naruto, though, has a unique power system. His connection to the Nine - Tails and his ability to use different types of chakra make him a force to be reckoned with. If we consider a battle, Goku's power might seem greater on the surface. But Naruto has the advantage of being able to surprise his opponents with his ninjutsu and clones. Also, Naruto has a strong willpower that has allowed him to overcome many tough situations, which could play a role in a fight against Goku.
Well, the plot could involve Naruto being a huge fan of Goku through some kind of inter - dimensional viewing device. He starts to mimic Goku's training regime, much to the confusion of his friends in Konoha. Then, an evil force from the Dragon Ball universe somehow crosses over to Naruto's world. Naruto, with his new - found inspiration from Goku, decides to take on this threat, and in the process, he might even convince Goku to come and help him save his world. Along the way, there could be lots of comical moments as Naruto tries to explain ninja concepts to Goku and vice - versa.
One interesting concept could be the power dynamics. Goku's Saiyan abilities like the Super Saiyan forms combined with Naruto's chakra-based powers would create a really unique combat scenario. For example, how would Goku's Kamehameha interact with Naruto's Rasengan? Another concept is the cultural clash. Goku comes from a more futuristic and alien - influenced world in Dragon Ball, while Naruto is set in a feudal - like ninja world. Their different values and ways of life could lead to some really engaging character interactions. Also, the idea of their friends and allies interacting, like Goku's friends from Earth meeting Naruto's ninja comrades, could add a lot of depth to the fanfiction.
Goku would probably be really excited to meet Naruto. He'd be interested in Naruto's ninja skills and might ask to learn some of them. Naruto would be in awe of Goku's power at first but would quickly warm up and see him as a friend. They'd likely start by comparing their abilities and then team up to face a common threat.
In fanfiction, Hinata could teach Naruto about the Hyuga clan's gentle fist style. Since Naruto mainly focuses on his own powerful and straightforward combat techniques, Hinata's more refined and precise style could be a new area of learning for him.
One possible plot could be that Goku somehow gets transported to the Bleach universe. He might initially be confused by the concept of Hollows and Soul Reapers. But then, with his power, he could start fighting Hollows, thinking they are some sort of new villains. His ki-based attacks would be a new and powerful force in the Bleach world, and he could end up teaming up with Ichigo to fight a common, extremely powerful enemy, like a super - powerful Hollow that even the Soul Reapers are having trouble with.
Well, a Goku - One Piece crossover fanfiction might involve Goku getting lost in the One Piece universe. He could end up on a random island and befriend Luffy and his crew. Goku would probably be interested in the different Devil Fruits and might even try to use his powers to help them find the One Piece. His fighting skills would also be a great asset during battles against the likes of the Yonko or the World Government's forces.
One possible plot could be Goku from the SSJ4 form crossing over into the world of Dragon Ball GT. He could encounter new threats that require his ultimate form to defeat. Maybe he teams up with the other Z - fighters in that universe to face off against a powerful and ancient evil that was sealed away long ago and has now been unleashed.