In this fanfiction, Naruto might be watching Momoshiki fight in a vision or a special realm. As he watches, he is in awe of Momoshiki's raw power. But he also sees the flaws in Momoshiki's fighting. For example, Momoshiki might be overconfident at times. Naruto then contemplates how he can use this knowledge in his own battles. He could also be inspired to combine some of his own techniques with the things he learned from watching Momoshiki fight. This could lead to the development of new and more powerful jutsu for Naruto.
His understanding of different powers would grow. Momoshiki has unique abilities that Naruto may not have encountered before. By watching him fight, Naruto gets a better sense of how these powers work. This could lead to Naruto being more creative in his own use of chakra and jutsu. He might start to experiment with new combinations based on what he saw Momoshiki do. Also, Naruto could become more patient. He sees that Momoshiki doesn't always go for the quick kill but rather sets up his attacks carefully. This could influence Naruto to be more patient in his own combat situations, waiting for the right moment to strike instead of always going all - out from the start.
I really liked 'A New Beginning for Momoshiki in Naruto'. This fanfiction takes an interesting turn where Momoshiki is reincarnated in a different form and has to navigate the world of Naruto from a different perspective. It's full of action and also some great character development for Momoshiki. Also, 'Momoshiki and Naruto: Unlikely Allies' is a great read as it focuses on how their powers could combine in unexpected ways.
There are fanfictions where Momoshiki and Naruto interact in unique ways. Maybe Momoshiki has some knowledge that Naruto needs, and they have to negotiate. Their power levels are compared and contrasted. Naruto's ability to use Sage Mode and his chakra reserves are pitted against Momoshiki's alien - like powers. It creates a dynamic where both characters are forced to adapt to each other's fighting styles.
There could be physical changes too. Naruto might have a new form that combines his own features with Momoshiki's. His body could become more resilient, like Momoshiki's, and he might have a different chakra signature. This new form could attract the attention of other villains in the Naruto universe, either out of fear or the desire to steal his power. Moreover, his relationships with other characters like Sasuke could be affected, as they have to adapt to this new Naruto who has absorbed Momoshiki.
For the ninja world in the fanfiction, it might bring a sense of peace as Momoshiki was a powerful threat. However, it could also lead to new enemies emerging, seeking revenge for Momoshiki's death. Naruto might also have to deal with the political fallout, as some villages might see his act as an overstep of power or a sign of aggression.
A Momoshiki fanfiction could focus on his relationship with Boruto in an alternate universe. For example, they could end up as allies instead of enemies. They might team up to face a greater threat that endangers both their worlds. This would involve a lot of character development for both of them as they learn to trust each other.
One idea could be a 'momoshiki fanfic' where he forms an unlikely alliance with a group of heroes to fight a greater evil. This would show a different side of his character, exploring his motives and how he interacts with those he usually considers enemies.
Well, Boruto might feel a sense of pride seeing his father Naruto in action against Sasuke. He has heard so many stories about their battles, and now seeing it in a fanfiction version could make him realize the deep bond and rivalry between them. He might also analyze their fighting styles and try to incorporate some of their moves into his own combat techniques later on.