He may find that his ninja skills are either very useful or completely ineffective in the new world. If the new world has a different form of combat, Naruto would have to adapt quickly. Also, he could encounter new forms of nature energy or magic that he has to learn to control. There might be a love interest for Naruto in this new world as well, which could add a whole new layer of complexity to the story.
Naruto would probably be really confused at first in the Pokemon world. But then he'd start to explore. He might mistake a Pokeball for some kind of ninja tool at first. However, once he figures out how things work, he could become a really strong Pokemon trainer. His determination, which is one of his main traits in his own story, would help him a great deal in this new world. He would not give up easily when it comes to training his Pokemon or facing tough opponents in Pokemon battles.
Well, he might find himself in a world with completely different chakra rules. Maybe in this new world, his ninja skills are either overpowered or nearly useless. He could meet new characters that are similar to his friends in Konoha but with different personalities. For example, he might find a version of Sasuke who is more friendly from the start.
In this type of fanfiction, Naruto could potentially gain the power to control water more proficiently as Uzushiogakure was known for its water - based jutsu. Maybe he'd also gain some unique sealing techniques that were passed down in Uzushiogakure.
Well, he might start by being really confused. The Devil Fruits would be so strange to him compared to chakra. He could probably make friends with Luffy easily though, since they both have that adventurous spirit. And his ninja skills could come in handy when fighting pirates. Maybe he'd teach some of the Straw Hats some cool ninja moves.
Well, Naruto might be really surprised at first. He could find that the fighting styles are different as they are designed by females. Maybe he would have to adapt to new social rules and ways of communication. For example, he might need to be more polite in a different way than he is used to in his own world.
He could meet female versions of his existing friends like a female Sasuke or Sakura. They might have different personalities while still retaining some of the traits of their male counterparts. For example, a female Sasuke could be just as strong - willed but with a more feminine touch in her fighting style.
If Naruto goes to Wakanda, he could potentially form new alliances. His friendly nature might lead him to make friends with the Wakandan warriors. He could learn about their unique fighting styles and in return, teach them some ninja techniques. It would be an interesting exchange of skills and knowledge.
Percy would probably be curious about Naruto's positive attitude. He might bond with Naruto over their shared experiences of being kind of outsiders. Percy is a demigod among mortals, and Naruto was an outcast in his village at first.