If trained by Kurenai, Naruto could develop a more fluid and evasive fighting style. Kurenai is good at moving around undetected and quickly changing positions. Naruto could pick up on this and combine it with his own speed and agility. His movements in battle could become less predictable, making it harder for his opponents to land a hit on him. Also, he might start using genjutsu - enhanced taijutsu, where he uses illusions to misdirect his opponent's defense while delivering a physical blow.
Naruto's fighting style would likely become more stealth - oriented. Since Obito is known for his ability to move undetected, he might teach Naruto some techniques to blend into the shadows and surprise his opponents. For example, Naruto could learn to use the environment to his advantage in a more subtle way, rather than his usual straightforward attacks.
Naruto's fighting style would likely become more refined. With Sakumo's training, he might start using more precise jutsu instead of his usual brute - force attacks. He could also incorporate more strategic movements, like better use of the terrain and stealth.
If Naruto were trained by Madara and Hashirama, his fighting style would be a blend of their two distinct styles. Madara was known for his powerful and aggressive attacks, while Hashirama was more about using nature chakra and large - scale jutsu. Naruto would start to use his shadow clones in more complex ways, like setting up traps as Madara did. He'd also become more proficient in using natural elements in combat, perhaps creating new jutsu that combine his existing Rasengan with wood - style or other nature - based elements. His movement would be more fluid, taking cues from both Madara's agility and Hashirama's stability in battle. This new fighting style would make him an even more formidable opponent, not just in the Leaf Village but across all the shinobi world.
Naruto would likely become more patient. Kurenai's training methods might force him to slow down and think more carefully, which is different from his usual impulsive self. This could lead to him making better decisions in battles.
Naruto might also develop a more ruthless edge to his fighting. Zabuza was a cold - blooded killer in a way. While Naruto wouldn't become evil, he could be more decisive in combat, not hesitating as much when it comes to taking down opponents. He may also learn some of Zabuza's sword - fighting skills, adding a new dimension to his fighting style if he combines it with his kunai and shuriken use.
Naruto might incorporate more stealth elements from Oliver Queen. His usual in - your - face combat style could become more calculated, with Naruto using the environment to his advantage just like Oliver does with his archery. He may also start using projectiles more effectively, similar to Oliver's arrows.
Naruto's fighting style might incorporate more of Killer Bee's unique techniques. For example, he could start using some of Bee's swordplay skills if he's trained in that. Also, Naruto might adopt a more fluid and acrobatic fighting style similar to Bee's. His use of chakra could become more refined, like how Bee can use his Tailed Beast chakra in creative ways.
If trained by Sanji, Naruto's sensory abilities could get better. Sanji has a good sense of smell which he uses in various situations. Naruto could learn to use his senses more effectively, not just relying on his chakra senses. Also, Naruto's ability to endure pain might increase. Sanji has endured a lot in his life, and he could pass on some of that mental toughness to Naruto, allowing him to push through tougher battles and train harder without getting worn out as easily.
If Naruto is trained by Akatsuki in fanfiction, his skills would be transformed in multiple ways. His chakra control could be refined to a much higher level. Akatsuki members are experienced in dealing with large amounts of chakra, and they could teach Naruto how to better manage his own vast reserves. His combat strategy would shift from the more straightforward and honorable style of Konoha to a more cunning and adaptable approach. He might also gain knowledge about sealing techniques that the Akatsuki has used to capture tailed beasts. This new knowledge could not only enhance his fighting abilities but also give him an edge in dealing with other threats in the ninja world. His ability to sense and counter opponents would be sharpened as well, as the Akatsuki often deals with dangerous and powerful foes.
If Naruto was trained by the Akatsuki in fanfiction, his relationships would be completely transformed. For starters, his relationship with Kakashi would be strained. Kakashi has always been Naruto's mentor in a way, and seeing Naruto side with the Akatsuki would be a shock. His friends like Sakura and Shikamaru would also be confused and probably try to bring him back to the 'right side'. And his relationship with the villagers of Konoha would turn sour as they would fear his new - found Akatsuki - related powers.