Urahara Kisuke himself is an obvious choice to pair with Naruto. Their interactions could be filled with Kisuke teaching Naruto new techniques or Naruto showing Kisuke the power of ninjutsu. They could also form a friendship based on mutual respect for each other's abilities.
I think Ichigo would be a great character to pair with Naruto in Kisuke fanfiction. Since Kisuke has a connection to Ichigo's story, and Ichigo's combat style and determination could match well with Naruto's. They could learn from each other and have some really cool team - up moments.
Luffy from One Piece could also be a good pairing. Luffy's carefree and adventurous nature combined with Urahara's mysterious and intelligent personality would create a fun dynamic. They could be on a quest to find a special treasure that has both spiritual and pirate - related significance.
Another character could be Kakashi. Kakashi's wisdom combined with Byakuya's combat skills and Naruto's determination would make for a really engaging story. Kakashi could study Byakuya's techniques and try to incorporate some of that into Naruto's training, while also trying to understand Byakuya's motives in the Naruto world.
Well, Hinata could be paired with Guren in some fanfiction. Hinata's shy yet strong - willed nature could contrast with Guren's more assertive personality. It could lead to stories about friendship or even a mentorship kind of relationship. Kiba and his dog Akamaru could also be paired with Guren. Their teamwork - based fighting style could add a new dimension to stories involving Guren in the Naruto fanfiction world.
Naruto and Jack would be a great pair. Naruto's energetic and never - give - up attitude would mesh well with Jack's determination in Kickin It. They could learn a lot from each other, like Naruto teaching Jack about chakra control and Jack teaching Naruto some advanced martial arts moves.
Another good pair could be Kakashi and Eminem. Kakashi is a very laid - back yet highly skilled character. His calm demeanor could contrast well with Eminem's energetic and often angry - inspired lyrics, leading to some unique exchanges and perhaps even Kakashi learning a thing or two from Eminem about expressing emotions.
Kakuzu would be a great character to pair with Hidan in fanfiction. They were partners in the original story and had a very interesting dynamic. Kakuzu was always exasperated with Hidan's wild and unruly ways, which could lead to some humorous and tense situations in a fanfiction.
Sakura could be a great character to pair with Naruto in Flora fanfiction. She could act as a mentor to Flora, teaching her medical ninjutsu while Naruto teaches Flora some of his combat moves. Their combined efforts would make for an interesting dynamic.
Naruto and Carly themselves are great to pair as they come from such different worlds and can learn a lot from each other. Their interactions would be really interesting to explore.
Hidan could be a great character to pair with Kushimaru. They are both members of the Akatsuki, and their different personalities would create an interesting dynamic. Hidan's brash and bloodthirsty nature contrasted with Kushimaru's more reserved and calculated style could lead to some exciting storylines.
Another good pairing could be Kakashi and Sinon. Kakashi, being the experienced and wise ninja, could mentor Sinon in the ways of the ninja world. Sinon could, in return, introduce Kakashi to some modern concepts that could potentially give him new ideas for his own combat strategies.