Shino would be a great character to include. He has a unique set of skills with his bugs and a calm, mysterious personality. His interactions with Kiba, who is more hot - headed, could create some interesting dynamics. Also, Hinata could be added. Her shy nature and her long - standing feelings for Naruto could add a touch of romance and emotional depth to the side - story.
Rock Lee could be an interesting addition. His over - the - top determination and his special taijutsu skills would contrast well with the abilities of Kiba and Naruto. And then there's Tenten, who could bring in her weapon - based skills and a no - nonsense attitude. The combination of these different personalities would make for an exciting side - story.
Naruto himself would be a great addition. His determination and ability to never give up would translate well into being a Pokemon trainer. He could bond quickly with his Pokemon. Also, Kakashi would be good. His intelligence and strategic thinking would help in planning battles. And then there's Shikamaru. His lazy - but - brilliant mind could come up with unique battle strategies using the Pokemon's abilities.
In a Team Naruto fanfic, Naruto, Sasuke, and Sakura are the core. But don't forget Shikamaru. His intelligence can be a great asset to the team in strategic situations. Ino could also be added for her mind - related jutsu and her friendship with Sakura. Choji can bring some heart to the story with his loyalty and his unique jutsu. And of course, Kakashi, who can be the guiding force for the team, teaching them valuable lessons both in and out of combat.
Naruto himself is obviously a must - as the main character of the fanfic. Sasuke could also be a great addition. Even if Naruto is on a solo mission, Sasuke's influence on Naruto's growth and their complex relationship can add depth to the story. Kakashi too. His wisdom and experience can be a guiding force for Naruto, even if he's not physically present with him all the time. Maybe Naruto recalls Kakashi's teachings during tough situations.
Obviously Naruto himself should be included as the main character in a Naruto one - man - team fanfic. Besides him, Kakashi could be a great addition as a sort of mentor figure who gives Naruto advice from time to time even though he's on his own. Another good character could be Jiraiya. He has a lot of knowledge and experience that Naruto could draw from in his solo adventures.
Yuki could be a great side character. She might be a friend to both Zero and Kiryu and offer advice to them in their relationship. Another good one could be Kaname. His presence could add some tension as he might have his own feelings towards one of them. Also, Aidou could be included. He could be the comical relief side character, always getting into silly situations that Zero and Kiryu have to deal with.
Definitely Naruto himself, since it's a drunk Naruto fanfiction. His friends like Sasuke and Sakura should be included too. Sasuke could react in his typical stoic but secretly concerned way when Naruto is drunk. Sakura could be the one trying to get Naruto to sober up or at least stop making a fool of himself. Kakashi would also be great, as he could have some humorous reactions to Naruto's drunken antics.
Shikamaru is a great character to focus on. His high intelligence makes for interesting plotlines. He can strategize his way out of difficult situations. For instance, in a fanfiction, he could be the key to solving a mystery that involves the entire ninja world.
Kurumu would be a great character to include. She has a crush on Tsukune and her jealousy towards Moka could add some interesting drama to the side story. Also, Mizore, with her cold exterior but warm heart towards Tsukune, could bring in some unique interactions. Gin, being a werewolf, could also be included as he has an uneasy relationship with the vampires, which could create tension and conflict in the side story.
For a more unique take, including Jiraiya could be great. His pervy but knowledgeable personality could lead to some humorous and yet useful moments. He might have some ancient knowledge about the connection between the Naruto world and the Pokémon world where Darkrai comes from. On the Pokémon side, Cynthia could be a great addition. As one of the strongest Pokémon trainers, she could offer a different perspective on Darkrai and also help in battles against any enemies that might be using Darkrai's power for evil.
Haku should definitely be included. Since Haku was Zabuza's loyal follower, his presence can add depth to the story. He could act as a mediator between Naruto and Zabuza at times. Also, Kakashi can be a great addition. His history with Zabuza makes for an interesting dynamic, and his mentoring of Naruto can play a role in how Naruto interacts with Zabuza.