Well, Naruto is the central character for sure. But we could also expect to see some well - known Pokemon characters. The Pokemon Professor in the region where Naruto starts his journey could be an important character. He would provide Naruto with his first Pokemon and give him advice on how to be a good trainer. Also, some powerful Gym Leaders or Elite Four members would be main characters as Naruto has to battle them on his path to becoming a Pokemon master.
Well, obviously Red is one of the main characters. He is the Pokemon master in this fanfiction. There may also be his rivals, like Blue or Green. And of course, his Pokemon would also play important roles, such as Pikachu which is often associated with Red in the Pokemon series.
I don't know for sure as I haven't read it. It could be a new trainer starting out on their journey to become a master.
Team Rocket from the Pokemon world could be the main antagonist. They might see Naruto as a threat to their plans of stealing powerful Pokemon. They could try to use their usual sneaky tactics on Naruto, but he would be too smart for them with his ninja training.
Obviously Naruto would be one of the main characters since he is the guardian. And there would probably be some Pokémon characters like Pikachu or Charizard that he interacts with.
Obviously, Ash and Chikorita are the main characters. Ash is the Pokémon trainer, and Chikorita is his Pokémon.
Obviously, Naruto would be one of the main characters. And there could be a Pokémon trainer who raises him. Maybe someone like Ash from the Pokémon series could make an appearance as a mentor - like figure to Naruto. Also, Naruto's friends in the ninja world could interact with the Pokémon, so they could also be important characters in this fanfiction.
Obviously Naruto would be the main character since it's about him being reborn as a Pokemon fan. His Pokemon partners could also be considered main characters. For example, a Pikachu that he befriends early on and they go on adventures together.
Obviously Naruto is going to be a central figure. Other important characters might include his mentors like Jiraiya. Jiraiya could offer guidance to Naruto during this time when he's feeling like he has no real mastery. Then there are his comrades like Shikamaru who might use his intelligence to try and figure out what's wrong with Naruto. And of course, villains from the Naruto world might also be involved, seeing Naruto's vulnerability as an opportunity to cause chaos in the ninja world.
Well, aside from Naruto, there could be some original characters created specifically for this fanfiction. Maybe there's a mysterious figure who is an expert in stealth and becomes Naruto's guide or adversary. And of course, Kakashi Sensei could also be involved. He could be the one who initially notices Naruto's potential in stealth and encourages him to develop it further, guiding him through various training exercises and missions related to stealth.