If Naruto had the Master Sword in a fanfic, his fighting style would transform in many ways. Firstly, he would need to develop his swordsmanship skills. This would involve learning how to parry and counter - attack effectively. His chakra control could be used to make the sword lighter or heavier depending on the situation. He could also incorporate his Sage Mode or Nine - Tails Chakra into the sword, making it glow with power and increasing its cutting ability. This would make his attacks more powerful and unpredictable.
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 become more melee - focused. Instead of relying solely on his ninjutsu and taijutsu, he would have to get in close with the claymore sword. He might develop new combinations, like using a clone to distract an enemy while he gets in a good sword strike.
He would probably add more slashing and thrusting motions to his attacks. Instead of relying solely on his shadow clones and rasengan, he could use the sword for close - range combat and combine it with his ninjutsu. For example, he could channel chakra through the sword to create a more powerful slash or use it to deflect incoming attacks more effectively.
If the Dragon Sword has special abilities, like being able to absorb chakra, Naruto's fighting style would change drastically. He could start using it to drain his opponents' chakra during battles. This would force him to get closer to his enemies, making his fighting style more aggressive and in - your - face compared to his usual ranged attacks.
His fighting style would likely become more melee - focused. Naruto is used to fighting from a distance with his jutsu, but with Zabuza's sword, he would need to get up close and personal. He might start to combine his ninjutsu with sword strikes. For example, he could use a clone to distract an enemy while he closes in with the sword for a surprise attack.
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.
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.
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 change significantly. He would no longer rely solely on his brute strength and Rasengan - based attacks. The Sharingan would allow him to see the flow of chakra more clearly, so he could target his opponents' weak points more precisely. He could also use genjutsu, which he has little experience with before. Maybe he would combine his shadow clones with the Sharingan's abilities, for example, having clones with Sharingan - enhanced vision to scout the area better during a battle.
If Sasuke had the Fire - Fire Fruit, his fire - based attacks would become much more powerful. His Amaterasu could potentially be even more destructive, as the Fire - Fire Fruit's flames might add an extra level of intensity. His fighting style would become more aggressive, relying on the overwhelming power of the fruit's fire to overpower his opponents.
His fighting style would become more diverse. If he got a devil fruit, say the Ope Ope no Mi (Operation - Operation Fruit), he could create rooms and manipulate objects within those rooms. This would be a huge departure from his normal ninja attacks. He could trap enemies in these rooms and then use his kunai and shuriken skills within the confined space to defeat them.