If Naruto had a Lightning Devil Fruit in a fanfiction, it would completely change his combat style. He could use lightning - based attacks more freely, like emitting bolts from his body at will. His speed would increase significantly during battles, similar to how characters with lightning - based powers are often depicted as extremely fast in other anime. This would make him a more formidable opponent against foes like Sasuke, who already has strong fire - based attacks. The dynamic of their rivalry would shift as Naruto's new power would give him an edge in certain aspects.
Naruto might become more confident with the Lightning Devil Fruit power. He could start to rely less on his Nine - Tails chakra and more on his lightning abilities. This would lead to a change in how he views himself as a ninja. He may also become more isolated as he tries to master this new power, which could then lead to some internal conflict as he has to balance his old friendships and his new power - seeking journey.
In a fanfiction about Naruto's Lightning Release, there could be a story where a young girl discovers she has latent Lightning Release abilities. She trains hard under Kakashi to master it. Along the way, she befriends other ninjas and together they form a team. Their adventures involve using Lightning Release to solve mysteries and defeat enemies. For example, they might use Lightning Release to track down a missing-nin who has a special ability to hide from normal detection methods.
In some fanfictions, it could be an enemy-turned - ally. This character, who originally fought against Naruto, realizes his strength and potential and decides to teach him black lightning as a way to make amends or to join forces with him for a greater cause.
One implication is that his speed will increase tremendously. Lightning is known for its quickness, so Naruto would be able to move at lightning - fast speeds, making it difficult for his enemies to track or counter him. This would give him an edge in battles, especially against opponents who rely on slow - moving attacks or are not as agile.
Well, in many fanfictions, Naruto might learn black lightning through intense training. Maybe he gets some special guidance from a powerful shinobi who has mastered it, like Kakashi or some other unknown but strong character. He could also discover some ancient scrolls that contain the secrets of black lightning.
Another way could be as a result of a special encounter. Maybe he discovers a hidden scroll or a mysterious artifact that imparts the power of lightning control to him. This discovery could be accidental, like when he's exploring an ancient ruin or during a battle when he stumbles upon something unexpected.
If Naruto ate a Paramecia Devil Fruit, his physical abilities might change drastically. For example, if it was a rubber - like Paramecia fruit, his already acrobatic fighting style could become even more so. He could stretch his limbs to attack from unexpected angles, much like Luffy in One Piece. This would give him an edge in close - combat situations, and his opponents would have a hard time predicting his moves.
He might gain an enormous boost in his chakra reserves. This could make his jutsus much more powerful and enable him to perform complex techniques with ease.
If Naruto had the Fire Devil Fruit, his combat style would change drastically. He could combine his existing ninja skills with the power of the fruit. For example, he might be able to infuse his Rasengan with fire, making it even more powerful. Also, his mobility could be enhanced as he could use fire to propel himself in new ways. This would make him a more formidable opponent in battles against strong foes like Sasuke or Pain.