Naruto's fighting style would likely become more focused on close - combat. Spartan armor is designed for hand - to - hand and melee combat. So he might rely less on his long - range ninjutsu and more on using his fists, a Spartan - style shield, and a short sword if the armor comes with those. He would also probably become more defensive, using the armor's protection to his advantage and waiting for the right moment to strike.
If Naruto has Spartan armor, his fighting style would change in several ways. Firstly, he would be more physically imposing. The armor would add weight and mass to his movements, which he would need to adjust to. He might start using more brute force in his attacks, like Spartan warriors did. His speed might initially decrease due to the armor, but as he gets used to it, he could combine his ninja speed with the power of the armor. Also, he could use the armor's unique features, such as spikes or grooves for grappling, in his combat. He may also develop new jutsu that are more in line with the Spartan aesthetic, like a jutsu that creates a Spartan - like phalanx formation with clones.
His fighting style would likely become more defensive. The metal armor could act as a shield, allowing him to block attacks more easily. He might also use it for more physical combat, like charging at enemies and using the armor's weight and strength to his advantage.
It could also change his offensive style. Naruto might be able to channel his chakra through the armor to create more powerful rasengan variations. The black lightning could add an extra element of destruction to his attacks.
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.
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.
Naruto's fighting style would likely incorporate more acrobatic flips and spins to take advantage of the lightsaber's reach. He'd also use his shadow clone jutsu in new ways, like having clones surround an enemy while he attacks from above with the lightsaber.
His fighting style would change in terms of strategy too. With the power armor, Naruto may not need to rely as much on his shadow clones. Instead, he could use the armor's defenses to withstand powerful attacks while he focuses on delivering more direct and powerful strikes. He might also use the armor's advanced sensors to detect hidden enemies or traps, changing the way he approaches a fight scene completely.
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.
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.
Naruto would likely incorporate more slashing and quick - draw techniques. With two zanpakuto, he could use one for defense and the other for offense more effectively. For example, he could block attacks with one zanpakuto while quickly counter - attacking with the other.