The story would change in multiple ways. Naruto being a fishman would mean different interactions with the characters in One Piece. He might have a different relationship with Arlong, for example. His values from the Naruto world would also influence the One Piece world. His sense of justice and loyalty would shape his actions. And his fishman powers would open up new plotlines, such as exploring the mysteries of the underwater world and how it relates to the poneglyphs and the Void Century in One Piece.
If Naruto was a fishman in One Piece, the storyline would be filled with new adventures. He could lead the fishmen in a fight for equality, much like he fought for his village in Naruto. His skills would be useful in exploring the Grand Line. He could use his chakra to sense hidden islands or treasures. And his backstory as a ninja - turned - fishman would be a fascinating addition to the complex world of One Piece. It would also introduce new elements like ninja - pirate alliances.
The storyline would change a great deal. Naruto's presence as a fishman would disrupt the existing power dynamics. His unique abilities would attract the attention of various factions in One Piece. For instance, the Marines might see him as a threat or an opportunity. And the Straw Hat Pirates might welcome him for his skills. His fishman nature would also give him access to areas and secrets that normal humans can't reach in the One Piece world.
In a fanfiction where Naruto is a fishman in One Piece, Naruto would face new challenges. For example, dealing with the discrimination that some fishmen face in the One Piece world. But he'd also have new opportunities. He could use his fishman physiology to swim faster and deeper, discover hidden treasures, and maybe even find a way to connect the ninja world with the pirate world. His Nine - Tailed Fox chakra might also have some interesting interactions with the strange powers in One Piece.
Well, it could be really interesting. The Naruto swordsman might bring unique sword - fighting styles from the Naruto world into One Piece. Maybe they'd join a pirate crew and use their skills in battles against the Marines or other pirates. Their ninja - like agility combined with swordsmanship could make them a formidable force on the Grand Line.
Well, it'd be a wild ride. Naruto's immortality would mean he could explore the Grand Line indefinitely. He could use his ninja skills to navigate the strange islands. Maybe he'd team up with the Straw Hats and share his unique abilities. His never - ending life could also lead to him uncovering ancient secrets in the One Piece world that others couldn't risk searching for.
Well, Naruto's chakra - based abilities would be quite unique in the One Piece world. His Rasengan, for instance, would be a powerful new type of attack that most characters in One Piece haven't seen. His ability to walk on walls and water using chakra would also give him an edge in many situations. He might also be able to use his chakra to sense things in a different way than the Haki users in One Piece, which could be a big advantage when exploring islands or looking for hidden treasures.
Naruto's ability to use chakra and perform ninjutsu would be quite different in the One Piece world. His Rasengan might be modified to incorporate elements of the sea, like sea - salt infused Rasengan to deal more damage to devil - fruit users. Kushina's chakra chains could be enhanced with sea - prism stone properties, making them more effective against Logia - type devil - fruit users.
If Naruto was the son of Kronos in fanfiction, it would completely upend the Naruto storyline. Kronos is from Greek mythology and has powers like time manipulation. Naruto might inherit such abilities, which would make his battles very different. He could potentially manipulate time to dodge attacks or age his opponents. His journey to become Hokage might be overshadowed by his newfound divine heritage and the powers that come with it.
Well, if Naruto had a zanpakuto in a fanfiction, it would completely shift the power dynamics. The zanpakuto has unique abilities in the Bleach universe. Naruto's existing jutsu and combat style would be blended with the new power of the zanpakuto. Maybe his Rasengan could be combined with a zanpakuto - based attack. It could also lead to new rivalries as characters from the Naruto world might be intrigued or threatened by this new power he wields.
Well, if Naruto had the Force, it would completely transform the Naruto universe. His already impressive physical abilities combined with the power of the Force would make him nearly unbeatable. He could use the Force to enhance his speed and strength even more during battles. His Rasengan, for example, could be infused with the Force to become an even more devastating attack. Also, he could use the Force to sense danger and the presence of enemies from a greater distance, which would give him a huge advantage in his ninja missions.
If Naruto were the son of Apollo in a fanfiction, it would transform the story. For one, Naruto's appearance might change to have more of an otherworldly or godly look. His training would not be just about learning ninja skills but also about mastering his divine heritage. The village's perception of him would also shift. Instead of being an outcast because of the Nine - Tails, he might be feared or revered because of his connection to Apollo. His enemies would also be more cautious, knowing he has godly powers at his disposal.
If Kushina were alive in Naruto fanfiction, it could change the story in many ways. For one, Naruto would grow up with a mother figure. He might not have faced so much loneliness and discrimination in the village as Kushina could have protected him. Also, Kushina was a powerful kunoichi. She could have trained Naruto herself, perhaps passing on unique Uzumaki techniques earlier. This could have made Naruto even stronger, more quickly.