It's likely that Naruto's chakra control and power would develop in new and unexpected ways. Black Zetsu might introduce him to strange chakra - based abilities that are not part of the normal ninja training. This could give Naruto an edge in combat, but it also might make him a target. Since Black Zetsu has his own motives, Naruto could be dragged into some dangerous and complicated situations that he may not be fully prepared for.
Well, one possibility could be that Zetsu imparts some unique and dark jutsu to Naruto. Maybe Naruto starts to learn stealth and subterfuge skills from Zetsu, which are different from what he learned at the ninja academy. This could lead to Naruto having an edge in certain battles where traditional ninja skills aren't enough.
He may develop a more calculating side. Black Zetsu is all about manipulation. Naruto could start thinking several steps ahead in a more devious way. For example, he might start using people's weaknesses against them, which is completely against his original nature. This change in personality would likely cause a rift between him and his friends who know him as the always - honest and straightforward Naruto.
There could be internal antagonists within Naruto's own village. Some of the more conservative ninja in the village might not trust Naruto's new - found skills and powers obtained from Zetsu. They could try to undermine Naruto or even attempt to exile him, fearing that he has been corrupted by Zetsu's teachings.
In this kind of fanfiction scenario, Naruto might gain some unique and dark powers. Yami, often associated with shadow or dark elements, could teach Naruto skills that are not part of his normal ninja training. For example, Naruto could learn how to manipulate shadows in combat, or he might develop a more stealthy and cunning fighting style. This new training could also change his personality a bit, making him more reserved and mysterious.
In a fanfiction where Naruto is trained by Zabuza, Naruto would gain a whole new perspective on fighting. Zabuza's style is very different from what Naruto has learned so far. Zabuza could teach Naruto about the importance of misdirection in combat, like how he uses the mist to hide his movements. Naruto might also pick up on Zabuza's ability to analyze an opponent's weaknesses quickly. This training could potentially make Naruto a more well - rounded fighter, able to adapt to different situations more easily. However, he would need to be careful not to let Zabuza's more cut - throat approach overtake his own kind - hearted nature.
If Naruto were trained by Goku Black in fanfiction, it would be a wild combination. Goku Black is from a different universe with different power systems. He could introduce Naruto to concepts like ki, which might blend with Naruto's chakra in interesting ways. Naruto's physical abilities would likely skyrocket, and his combat strategies would be completely revolutionized. He might start using more acrobatic and flashy moves, like Goku Black does.
In a fanfic where Naruto is trained by Zetsu, the story could take an interesting turn. Zetsu has knowledge of the Akatsuki and their secrets. Naruto could learn about the organization from the inside out. This knowledge could help him in his quest to bring peace. He might also gain some physical enhancements. Zetsu is quite durable in his own way, and Naruto could inherit some of that sturdiness. This would make him an even more formidable opponent in battles against strong foes like Pain or Madara.
In this fanfiction, Naruto might gain some unique jutsu skills from Itachi. Itachi is extremely powerful, so he could teach Naruto advanced genjutsu or ways to better control his chakra. For example, Naruto might learn how to quickly break free from strong genjutsu attacks, which would be a great advantage in battles against tough opponents.
The training by the fem Kyuubi could also change Naruto's view of the world. He might start to see the tailed beasts in a new light, not just as powerful and dangerous entities but as beings with their own personalities and stories. This could potentially lead to him trying to bridge the gap between humans and tailed beasts in the fanfiction world.
In this fanfiction scenario, their teamwork could reach a new height. Hagoromo would likely train them together, so they would understand each other's strengths and weaknesses better. Naruto's optimism and Sasuke's more brooding nature could be balanced out under Hagoromo's guidance. They might also learn new joint - attack techniques. For example, they could combine Naruto's Rasengan and Sasuke's Chidori in a way that is more powerful and versatile than before. Their bond as friends and comrades would be strengthened, and they would be better equipped to face any future threats to the ninja world.