In fanfiction, Naruto as a master swordsman might have a fighting style that is based on his experiences. Since he has always been about protecting his friends, his swordsmanship could be defensive - oriented at first. But as he grows in power, he would start to use more aggressive techniques. He could use the Rasengan in combination with his sword, perhaps creating a Rasengan - charged sword strike. His style would also be influenced by the people he has met, like learning some sword - handling tricks from Kakashi or other sword - using ninjas in the village.
His fighting style would probably incorporate a lot of puppetry. He'd use puppets in combat like Sasori does. Maybe he'd also use some of the unique poisons that Sasori is known for. His style would be less about brute force and more about strategy and misdirection.
If Naruto were the guild master of Fairy Tail in fanfiction, his fighting style would be a fascinating mix. Naruto has always been a scrappy fighter, relying on his wits and his ability to improvise. In Fairy Tail, he would learn to adapt to the different magical environments. He could use his Nine - Tails chakra in ways that interact with Fairy Tail magic. For instance, his Nine - Tails cloak could be enhanced with lightning magic to increase its power. His fighting style would also be influenced by the fact that he's leading a guild. He'd need to be more strategic in battles, thinking about not just his own attacks but also how to coordinate the attacks of his guild members, which is different from his more individual - focused fighting in Naruto's original world.
His fighting style would be more brute - force based. Instead of using all those ninja techniques in a strategic way, he'd just charge in and start slashing like Kenpachi.
Sasuke could be one. Since they have a long - standing rivalry, Sasuke, with his own powerful skills, would be a great opponent for Naruto now that he's a master swordsman. They could have an epic battle where sword meets sword and their respective powers clash.
Naruto's fighting style would change significantly. The Master Sword is a melee weapon, and Naruto is not used to relying on such a weapon. He would have to learn new footwork and combat stances. He could start using the sword as an extension of his arm in close - quarters combat. Also, he could use his shadow clones to create diversionary attacks while he strikes with the sword from unexpected angles.
His fighting style would likely incorporate more acrobatic moves. Since the Keyblade can be used for things like jumps and dashes in mid - air, Naruto would start using these abilities. He might also use the Keyblade to block attacks more effectively than he could with just his kunai or shuriken. And he could use the Keyblade's power to enhance his speed, allowing him to quickly close the distance between him and his opponents or dodge attacks more easily.
His fighting style would become more versatile. Naruto is used to his shadow clones and Rasengan techniques. But with Samehada, he could add a whole new dimension. Samehada absorbs chakra, so Naruto could use it to drain his opponents' chakra during close combat. He might also be able to combine his own chakra with Samehada's absorption ability to create some unique attacks that are more about disabling the enemy's chakra system rather than just physical damage.
His fighting style would become a blend of his original ninja techniques and the powers of Hyourinmaru. Naruto could use his clones to distract opponents while he uses Hyourinmaru to strike from unexpected angles. The ice powers would give him an advantage in certain terrains, like frozen landscapes. He would also have to learn to control the release of Hyourinmaru's power, which is different from his chakra control. This would lead to a more diverse and unpredictable fighting style.
Naruto could combine his Shadow Clone Jutsu with Stormbreaker. He could create clones to surround his enemies and then use Stormbreaker to launch a powerful attack from the center. This would be a new and unexpected tactic for his opponents. Also, he might use his chakra to enhance the power of Stormbreaker even further, like making it shoot out energy blasts.
His fighting style might also become more strategic. Since the Amaterasu Zanpakuto is a powerful weapon, Naruto would need to think about when and how to use it. He might use his regular ninjutsu to distract his enemies first and then surprise them with a swift strike from the Zanpakuto. Also, he could use his clones to set up a formation where the Zanpakuto's power can be maximally utilized, like having clones surround an enemy and then all attack with the Amaterasu - infused Zanpakuto at once.