One idea could be that Naruto is banished from the Hidden Leaf and somehow ends up in the Digimon world. There, he might form a bond with a Digimon like Agumon. He could use his ninja skills along with the Digimon's powers to face new threats. Another idea is that the banishment was a setup by an enemy who wants Naruto in the Digimon world to disrupt some kind of balance there.
Naruto's ability to use shadow clones could be really useful. He could send out clones to scout the Digimon world, looking for resources or threats. His Rasengan could also be adapted. Maybe he could combine it with a Digimon's energy attack for a more powerful blow. Also, his speed and agility from being a ninja would give him an edge in battles against Digimon.
The merge can also happen on a more conceptual level. For example, the idea of friendship and teamwork, which are important in both series, could be the connection. Naruto's belief in his friends and the Digidestined's bond with their Digimon could be seen as similar. This similarity could be the starting point for the two worlds to interact in fanfiction. Writers might have Naruto and the Digidestined team up to fight a common enemy that threatens both the Digital World and the ninja world. They would combine their unique powers and skills to achieve victory.
One interesting crossover could be Naruto characters getting Digivices and having to learn how to handle Digimon partners. For example, Naruto himself might get a Digivice and his boisterous personality could lead to some really exciting adventures with his Digimon. Maybe his Digimon would be a fire - type, like Agumon, and they would have to work together to defeat enemies that threaten both the Digital World and the Hidden Leaf Village.
Omnimon could also be a very powerful partner for Naruto. Omnimon is a super - powerful Digimon resulting from the fusion of WarGreymon and MetalGarurumon. Naruto's ability to make friends and work in teams would be perfect for handling Omnimon's complex nature. Together, they could take on any enemy in the fanfiction world.
Naruto might also initially feel a sense of abandonment. However, his kind - hearted nature could lead him to try and see the good in the situation. He could start to explore the world outside, learning about different cultures and ninja techniques. He may use this experience to become more empathetic towards others who have also faced hardships, and in the long run, this banishment could be a turning point in his life to become an even greater ninja.
At first, Naruto is probably shocked and confused. He might not understand why the village would take such a harsh step just for hurting Sasuke. He may feel betrayed, especially if he thought he had friends and allies in the village.
If Naruto summoned a Digimon, it could strengthen his bond with his friends. For example, if he summoned a cute Digimon like Patamon, his friends would be more protective of both Naruto and the Digimon. However, some of his more serious friends like Shikamaru might be a bit skeptical at first. But overall, it would add a new element to their group dynamic.
A possible plot for this type of fanfiction could involve the banished ninja having a secret mission that the village doesn't want to be associated with. So, they banish the ninja to make it seem like they have no part in it. The ninja then has to complete the mission while also dealing with the stigma of being banished.