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.
In some fanfics, Naruto can be made stronger than Goku. Fanfic writers have the freedom to manipulate the power levels and abilities of characters. They can give Naruto new and overpowered abilities that surpass Goku's. However, in the original canon of their respective series, Goku has extremely high power levels and abilities that are on a different scale.
Well, it could be super powerful. The fusion might have Goku's Saiyan strength and ability to transform into Super Saiyan forms, combined with Naruto's ninja skills and chakra control. It could fly around with the speed of a Saiyan and use Rasengan - like attacks with the power of a Kamehameha. Just imagine a character with the orange gi and a headband.
One possible plot could be that Naruto, as Goku's brother, has to learn the ways of ki while also maintaining his ninja skills. Maybe they team up to fight a common enemy that threatens both the ninja world and the Dragon Ball universe.
In a 'Naruto descendant of Goku' fanfiction, the plot could involve the discovery of a hidden bloodline in the Naruto universe that is related to Goku. This descendant might initially be an outcast because of their strange powers. However, as the story progresses, they start to show the true potential of their combined heritage. They could teach the ninjas about ki control, which is similar to chakra control in some ways. And in turn, they learn about the complex political and social structures of the ninja world from Naruto and others.
Well, Naruto would probably become extremely powerful. Goku's training methods are intense and focus on pushing physical limits. Naruto, with his already strong will and chakra, could gain new levels of strength. He might learn how to better control his chakra in ways similar to how Goku controls his ki. Also, Goku could teach Naruto some of his signature moves, like the Kamehameha, which Naruto could potentially adapt to his own style using chakra.
Well, it could be that Goku somehow ends up in the Naruto universe and has a son with a female character there. And this son has both the powers of a Saiyan like super strength and the ability to use chakra for jutsus. Maybe he's an outcast at first because of his strange powers but then becomes a hero.
Well, Naruto would probably be an incredibly powerful fighter from a very young age. Goku's training methods are intense, so Naruto would grow up with superhuman strength and speed. He might also inherit Goku's love for food and his kind - hearted nature. His ninjutsu skills could be combined with Goku - like physical power, making him a nearly unstoppable force in the Naruto universe.