One possible scenario is that Naruto would gain a lot more knowledge about the village's history and politics. The Sandaime, being an experienced Hokage, could teach Naruto about the different clans in the village, their relationships, and how to manage them. Naruto might also learn more advanced jutsu more quickly, as the Sandaime could give him personal training. This could make Naruto a much stronger ninja at a younger age and perhaps change the course of some of the earlier story arcs.
Naruto's relationship with the villagers would improve more rapidly. The Sandaime could help Naruto show the villagers his growth and potential in a more organized way. Naruto would also have a different relationship with the other ninja. He'd be seen as someone with a closer connection to the Hokage, so they might be more respectful or more likely to follow his lead. And his relationship with his own inner self would change too. He'd have more confidence knowing he's being trained by such an important figure.
His training would likely be intense. The Sandaime would probably start with the basics of chakra control, making Naruto practice things like tree - walking and water - walking until he perfects them. Then, he might move on to teaching Naruto more advanced ninjutsu, like some of the Hirashin no Jutsu variants that only a few in the village know.
One possible plot could be Naruto learning unique jutsu directly from the Sandaime. For example, he might be taught some long - forgotten sealing techniques that give him an edge in battles. Another plot could involve Naruto getting insights into the village's history and politics from the Sandaime, which helps him better understand his role in the village.
Naruto could learn the art of poison from Sasori. Since Sasori was known for his use of poison in his puppets, Naruto might find a way to use it defensively, like coating his kunai with a non - lethal poison that just immobilizes enemies.
Well, Naruto might become extremely powerful. The Sandaime Hokage has a wealth of knowledge and skills. He could teach Naruto some very unique jutsu and also help him better understand the values of the village. Maybe Naruto would grow faster in terms of combat skills and leadership abilities.
Well, Naruto would likely gain a different perspective on the Uchiha. Mikoto could share stories about Itachi and Sasuke when they were younger. This would make Naruto understand Sasuke on a deeper level. For example, he might realize why Sasuke is so driven by revenge and be better equipped to handle their relationship.
The apprentice could learn unique jutsu from Orochimaru. Since Orochimaru is known for his forbidden jutsu, the apprentice might gain an edge in combat but also face the danger of being corrupted by the power. They could then use these skills in battles against common enemies. And, in the process, they might try to redeem Orochimaru in some way, like showing him that there is a better path than his thirst for power.
If Naruto becomes a bodyguard, he could use his unique jutsus in interesting ways. His Rasengan, for instance, could be a last - resort defense mechanism. Also, his ability to sense danger through his chakra could be very useful in protecting his charge. He may even develop new jutsus specifically for bodyguard duties.
Well, Naruto might gain Mewtwo's psychic powers. He could use them in battles, like being able to move objects with his mind and read the thoughts of his enemies. It would be a huge advantage for him. Also, his appearance might change a bit to incorporate some of Mewtwo's features, like the purple color or the long tail. Maybe he would struggle at first to control these new powers, just like he did with the Nine - Tails' chakra in the original story.
Well, he might gain enhanced speed and stealth. Kitsunes are often associated with these traits in Japanese folklore. Naruto could use his new form to surprise his enemies during battles. He might also develop new jutsu related to fox magic, like creating illusions that are more powerful and harder to break.