A plot might involve the Digimon coming to the Naruto universe. The Digimon's digital powers could be seen as a new form of jutsu. Some of the ninja might be suspicious of the Digimon at first, but then they realize that they can work together. For instance, a Digimon with the ability to fly could help the ninja in scouting missions, and in return, the ninja could teach the Digimon about stealth and strategy.
Maybe there's a dark force that is threatening both the Naruto world and the Digital World. Naruto and the Digimon heroes must combine their strengths. The Digimon could use their evolution abilities to match the power levels of the strong foes in the Naruto world. And Naruto could use his Sage Mode to sense the digital energy of the Digimon, leading to new ways of communication and cooperation between the two groups.
Another plot could be that there is a common enemy that threatens both the Digital World and the Naruto world. So, Naruto and some of his ninja friends, along with a group of Digimon, have to work together. Naruto's shadow clones could be used to create diversions while the Digimon attack from different angles. And the Digimon's ability to evolve could give them an edge in battles against the powerful enemies that they face together.
A possible plot could be that the Digimon King is actually a long - lost relative of Naruto. Naruto discovers this connection and travels to the Digimon world to learn more about his heritage. Along the way, he teams up with various Digimon and they embark on a quest to find out the truth about the relationship between the two worlds. They face many challenges, such as ancient Digimon prophecies that seem to foretell Naruto's arrival and his role in either saving or destroying the Digimon world.
Another concept could be the different Digimon evolutions being related to Naruto's growth as a ninja. As Naruto becomes stronger and more experienced, his Digimon partner could also achieve higher levels of evolution. This would mirror Naruto's journey in the ninja world and add an exciting parallel to the story.
Well, it could be about Naruto and Gohan getting transported to the Digimon world. Maybe they team up with some Digimon to fight a common enemy. They could use their unique abilities like Naruto's jutsu and Gohan's ki powers in combination with the Digimon's attacks.
Marcus could be a bridge between the two worlds. Since he's from the Digimon world, he could introduce the concept of Digimon to the Naruto characters. His combat skills and the bond with his Digimon could be something that Naruto and his friends look up to.
One idea could be that the Pokeballs and Digivices somehow get mixed up. So trainers start finding Digimon in Pokeballs and vice versa. It would lead to a lot of chaos as they try to figure out how to handle these new creatures. Another plot could involve a villain who wants to combine the power of Pokemon and Digimon for evil purposes, forcing the heroes from both worlds to team up.
Maybe there's a situation where the Digimon from both series start to lose their powers for some unknown reason. The characters from Digimon 02 and Tamers must journey together to find the source of this problem. They could encounter old enemies and new threats along the way. The Tamers' more technical knowledge and the Digimon 02 gang's experience in the digital world could be key to solving the mystery.
One interesting plot point is the clash of the two different worlds' technologies and magic. For example, in some fanfics, the Digimon's digital abilities interact strangely with the magic of Equestria. Another is the cultural exchange. Ponies are used to a very different social structure compared to the Digimon. So seeing how they learn from each other, like the Digimon learning about friendship in the MLP way, is fascinating.
One idea could be that the Digimon and Pokemon worlds collide due to a strange rift. The main characters from both universes have to team up to close the rift. For example, Ash from Pokemon and Tai from Digimon could lead their respective teams. They would encounter challenges like Digimon getting lost in the Pokemon world and vice versa, and have to figure out how to communicate and work together to solve the problem.
One idea could be that Davis gets transported to a different Digimon universe where the rules are all mixed up. For example, Digimon don't evolve in the traditional way. He has to figure out how to adapt and find his way back home while also making new friends and facing new enemies.