Goku would likely be Naruto's strongest ally. Goku is always open to new training and new friends. His pure heart and love for fighting would mesh well with Naruto's own determination and will to protect. They could learn from each other's fighting styles and power - ups, creating a very powerful duo.
Maybe it would be Trunks. Trunks has seen a lot of tough situations and is a strong fighter. He would be drawn to Naruto's godlike powers and would want to learn from him. At the same time, Trunks' own experience with time travel and different threats could be useful to Naruto. They could form a bond over their shared desire to protect their respective worlds and become a formidable team against any threats in the DBZ universe.
One possible plot could be Naruto arriving in the DBZ universe and quickly realizing he has to adapt to the new power levels. He might start training with Goku to learn about ki, while also teaching Goku about chakra. Their combined skills could then be used to face a new, powerful enemy that threatens both universes.
His powers would probably be seen as very strange. The DBZ characters are used to ki - based powers. Naruto's chakra and jutsu would be something they've never encountered. They might initially think it's a weak form of energy. But once they see what Naruto can do with his shadow clones and powerful attacks like the Rasengan, they'd start to take him more seriously.
However, it might also depend on the situation and how their powers interact. If they were to fight in Naruto's world, Naruto might have an advantage as he knows the terrain better and has his ninja allies. But in Danny's world, Danny would be more at home and could use the unique features of the Ghost Zone to his advantage.
However, it might not be just about Naruto or Goku. A new character created through the fusion of Naruto and Goku's powers could potentially be the most powerful. This character would have the best of both worlds - the Saiyan's fighting instincts and raw power along with Naruto's strategic thinking and unique ninja abilities.
Bulma from DBZ can also be a popular character in these fanfictions. She's smart and resourceful. In a story with a godlike Naruto, she might be the one coming up with the plans to use Naruto's powers in new ways or to help the group get out of tough situations. Also, characters like Kakashi from Naruto can bring their unique skills and mentoring - like qualities to the fanfiction.
Steve Rogers could be a great ally. Steve's strong sense of justice and leadership would mesh well with Naruto's own values. They both have a history of standing up against powerful enemies. Steve could also learn a lot from Naruto's unique fighting style and his ability to never give up. For example, Naruto's use of chakra to enhance his physical abilities might inspire Steve in new ways of combat.
If Naruto is brought to the DBZ universe in fanfiction, it could go in many ways. One possibility is that his chakra would be seen as a strange form of energy similar to ki. Naruto's determination and never - give - up attitude would likely earn him some respect. However, he'd also face challenges. For example, the saiyans' ability to transform and gain huge power boosts would be something he'd have to figure out how to deal with. He might also try to introduce ninja concepts like stealth and misdirection to the DBZ fighters who mostly rely on brute strength.
Luke Skywalker could be a likely ally. Luke is known for his open - mindedness and his ability to see the good in people. He would probably be intrigued by Naruto's unique powers and his strong sense of justice. They could team up to fight against the Sith or any other common enemies.
Akeno could also be a close ally. Her calm and collected nature might balance Naruto's more impulsive side. They could team up in battles, with Naruto using his ninja techniques and Akeno using her lightning - based powers. Plus, Naruto's friendly personality would probably make Akeno enjoy his company.
I think it could be Captain America. Cap is always looking for good - hearted individuals to fight alongside. Naruto's determination and loyalty would appeal to him. Also, Naruto could learn a lot from Cap's leadership skills.