Well, in the 'Naruto trains his younger self fanfic', it could be that the older Naruto imparts his wisdom about dealing with loneliness. The younger Naruto has always struggled with being alone, and the older version could share his experiences on how to turn that loneliness into strength, which would change the younger Naruto's perspective on many things.
In this fanfic, Naruto might teach his younger self some advanced jutsu. For example, he could show the younger Naruto how to better control the chakra for Rasengan at an earlier stage. This would make the younger Naruto stronger faster in the story.
The 'Naruto trains his younger self fanfic' could have a lot of interesting developments. Maybe the older Naruto trains the younger one in stealth techniques that he learned during his time with Kakashi. He could also tell the younger Naruto about the importance of teamwork in a more impactful way, since he has been through so many battles and learned the hard way about the value of his comrades. This would not only make the younger Naruto a better ninja but also change the way he interacts with his friends like Sasuke and Sakura.
One possible thing that could happen is that Naruto could teach his younger self some advanced jutsu. For example, he might show the younger Naruto how to better control the Nine - Tails' chakra earlier. This would give the younger Naruto a significant power boost and change the way he approaches battles in his early days.
If Naruto is sealed in his younger self in a fanfic, it could be chaotic. His chakra control might go haywire as his younger body tries to adapt to the sealed future self. The village elders might notice something strange and try to investigate. His training with Iruka Sensei could take a whole new turn as he might show advanced skills too early. This could also have an impact on the Nine - Tails within him. The Nine - Tails might react differently to this new situation, perhaps becoming more or less aggressive depending on how the seal affects Naruto's mental state.
In this kind of fanfiction scenario, Naruto could potentially change a lot of things. He might use his knowledge of future events to prevent certain tragedies. For example, he could try to save his parents or prevent the destruction of the village by Orochimaru earlier. He could also train his younger self more effectively, sharing all the skills he has learned over the years.
The story might progress with the older Naruto taking the younger one on special training missions. They could go to places that the younger Naruto has never been before, like some hidden training grounds in the outskirts of Konoha.
Well, Naruto might try to give his younger self some advice. Maybe he'd tell him to train harder or to be more understanding of Sasuke earlier. It could be a really interesting scenario where the older Naruto tries to prevent some of the bad things that happened in his past from occurring again.
In this kind of fanfiction, it could lead to some really interesting power dynamics. Naruto might gain new abilities or have a different understanding of his powers at a younger age. Maybe he could use the power of the Juubi to protect the village in ways he couldn't before in the original story.
He might start with basic physical training. You know, like running up mountains or doing a lot of push - ups to build strength. Also, chakra control exercises would be key. He could teach his younger self to focus chakra on different parts of the body for more effective jutsu use.
Well, it could have a huge impact. Naruto, being more experienced, can teach his younger self new jutsus. He might also instill in him a stronger sense of self - belief. For example, he could show his younger self how to better control the chakra of the Nine - Tails. This would make his younger self more confident in battle and in dealing with the village's expectations.
The training could speed up the younger Naruto's growth. He would become stronger and more skilled faster, which might lead to different outcomes in battles. For instance, he could defeat enemies more quickly and with less damage to himself and the village.
Well, Naruto could also mentor his younger self about the importance of friendship. He's had so many experiences with his friends like Sasuke and Sakura. He might tell his younger self not to take their relationships for granted and how they all contribute to his growth as a ninja.