Well, if Naruto used mana in fanfiction, his combat style would likely become more diverse. His signature jutsu like Rasengan might incorporate mana elements, making it even more powerful and perhaps having additional effects such as mana - based explosions or the ability to disrupt an opponent's mana flow.
If Naruto uses mana in fanfiction, his relationships with other characters could be affected. For example, his friends might be initially confused or even jealous of his newfound power source. He might also encounter characters who are experts in mana usage and have to prove himself to them. His growth as a character would no longer be solely based on chakra but on his understanding and mastery of mana, which could lead to some interesting character development arcs.
In a fanfiction where Naruto uses mana, it could open up new plotlines. He might have to learn how to control and manage his mana, which could be different from chakra. Maybe he'd go on a journey to discover ancient mana - based techniques, similar to how he sought out new jutsu in the original series. This would not only expand his abilities but also introduce new allies and enemies who are also involved with mana.
A 'Mana - Clone Jutsu' could be possible. These clones would be made of mana instead of chakra, and they might have different properties. For instance, they could be more durable or have the ability to explode on contact, sending out mana waves that disrupt the opponent's own mana or chakra.
I'm not sure if there is such a specific fanfiction. There are countless Naruto fanfictions out there, but this particular concept of Mana Naruto being Zabuza's mate is rather unusual. It might exist in some niche corners of the fanfiction world, but it would take some extensive searching through fanfiction platforms to find it.
His water - based jutsu might improve. Since Kiri is known for its water ninjutsu, Naruto could learn new techniques or modify his existing ones. For example, he could combine his Rasengan with water chakra to create a more powerful and water - enhanced attack.
A fanfiction like this would likely be full of challenges. Since Zabuza is a rather ruthless character in the original Naruto, having him as a mate for Mana Naruto would mean a lot of conflict. Maybe the fanfiction would show how Mana Naruto tries to change Zabuza's ways, or it could explore how their relationship affects the political and social situations in the Naruto world. There would also be elements of action and adventure as they face threats together and protect each other.
His ninjutsu might be enhanced. For example, his Rasengan could gain new properties due to the influence of Campione powers. His speed and strength, which were already considerable in the Naruto world, could be further increased. Maybe his ability to sense danger, which was related to his ninja training, could be upgraded to a more supernatural level in the Campione world.
He might gain some of Whitebeard's physical strength. Whitebeard was incredibly strong, and Naruto could inherit a portion of that. So he could be even more powerful in hand - to - hand combat. Also, he might get some kind of seismic - sense ability, like how Whitebeard could sense things through the vibrations in the air or ground.
His combat abilities would change a great deal. He'd likely be more proficient in close - range combat due to learning the Hyuuga's Gentle Fist. This would give him an edge in battles where quick, precise strikes are needed.
In this fanfiction, Naruto's abilities would change significantly. Firstly, he'd be exposed to Kumogakure's unique jutsu. He might learn more advanced lightning - style techniques which are prevalent in the Cloud Village. His combat style would be more brute - force - oriented, as the Raikage values strength. Also, his ability to lead and make strategic decisions would be molded by the Raikage's military - minded approach. He might not rely as much on his Uzumaki heritage in the beginning, but as he grows, he could find a way to combine the Raikage's teachings with his own innate abilities.
He'd probably be better at stealth. Haku was a master of it. Naruto might also have an earlier start with water - based jutsu and could potentially develop some ice - like jutsu similar to Haku's.
His chakra abilities might be affected by the presence of Dust in RWBY's world. Maybe he could combine Dust with his jutsu. For example, using fire - type Dust to make his Fireball Jutsu even hotter. His physical abilities like speed and strength would still be an advantage, but he'd have to learn to use them in the context of fighting Grimm and other RWBY threats.