A common trope is the idea of the Pokemon having chakra. This allows for some interesting interactions between the Naruto and Pokemon universes. Also, there's the trope of Pokemon trainers from the Pokemon world ending up in the Naruto world and having to adapt to its ways. They might end up in a ninja village and have to learn about ninjas and their skills. Sometimes, there are crossovers where legendary Pokemon play a big role in Naruto - related events, like helping to defeat a powerful enemy in the Naruto world.
You can try websites like Fanfiction.net or Archive of Our Own. They have a large collection of fanfictions, and you can simply search for 'Naruto Pokemon' in their search bars to get relevant results.
Some of the popular Naruto fanfiction tropes include the 'Power - Up' trope. In this, a character gains new and often overpowered abilities, which changes the course of the story. 'Redemption' arcs for characters like Sasuke are also quite common. There are also 'Crossover' fanfics, where Naruto characters interact with characters from other series. For example, Naruto meeting characters from the Dragon Ball series. These tropes add new and exciting elements to the original Naruto universe and are loved by many fans.
One popular trope is the 'fish - out - of - water' situation. Naruto characters finding themselves in the Pokemon Mystery Dungeon world and being confused by the new environment. Another is the power - up trope, where a character from either universe gains new abilities by interacting with the other.
One interesting storyline could be where Pokémon trainers from the Pokémon world end up in the Naruto universe. They might use their Pokémon to help in battles against the Akatsuki. For example, a Pikachu could use its electric attacks to counter some of the Akatsuki's jutsu that involve lightning - based defenses. Another could be Pokémon being used in the Chunin Exams, adding a whole new level of chaos and excitement.
In a Pokemon and Naruto crossover fanfiction, there could be a tournament where both Pokemon trainers and ninjas participate. The ninjas would use their jutsu and the trainers their Pokemon. It would be interesting to see how Naruto's Rasengan would compare to a powerful Pokemon move like Hyper Beam. And perhaps some Pokemon could learn to use jutsu from the ninjas they befriend, creating a whole new dynamic in the story.
One idea could be that Greninja, being a ninja - like Pokémon, somehow gets transported to the Naruto universe. It could team up with Naruto and use its water - based attacks in combination with Naruto's Rasengan. Maybe Greninja's ability to blend into the shadows could be used in stealth missions in the Hidden Leaf Village.
One common trope is the journey together. Characters in an altoshipping often embark on Pokemon adventures side by side. They might discover new Pokemon species or face difficult battles together. Another is the overcoming of differences. Since in altoshipping, it might involve pairings that are not the typical ones, they have to overcome the initial odd looks or doubts from others in the Pokemon world. Also, the growth of the relationship over time, starting from just acquaintances to deep, unbreakable bonds.
His Rinnegan might allow Naruto to have a psychic connection with Pokemon. He could use this to soothe wild Pokemon or even tame them without using pokeballs in some cases. When it comes to battles, his ability to use multiple jutsus could be translated into strategic moves with his Pokemon. For example, he could combine a water - type Pokemon's move with his own wind - style jutsu to create a more powerful attack.
Maybe there's a plot where a powerful and rare Pokemon is causing chaos in the Naruto world. The Naruto characters have to team up with some expert Pokemon trainers from the Pokemon world to stop it. Naruto could learn about the unique bond between trainers and Pokemon and apply some of those concepts to his relationships with his friends. And the Pokemon trainers could be in awe of the ninja techniques and use some of that knowledge to improve their own strategies.
Perhaps a story where a powerful Pokemon has the ability to grant wishes. Naruto and his friends, along with some Pokemon trainers, all race to find this Pokemon. Along the way, they face various challenges. The Naruto characters might use their chakra powers to overcome obstacles, while the Pokemon trainers rely on their Pokemon's attacks. Once they reach the Pokemon, they have to decide what to wish for, which could lead to a moral dilemma and some interesting character development.