One idea could be that Naruto discovers a strange portal that transports him to the Pokemon world. Since he has his ninja skills, he quickly adapts. He might start by befriending Pikachu, as it's one of the most iconic Pokemon. His goal could be to become a Pokemon master, using his determination from being a ninja.
Naruto's outgoing and determined personality would make him a great Pokemon trainer. He is not afraid to face challenges, which is crucial in the Pokemon world. His friendly nature would also help him befriend many different Pokemon easily.
Maybe Ash discovers a hidden power within himself that is linked to the legendary Pokemon. This power could be awakened through a series of dangerous adventures, like facing off against an evil team that is trying to capture all the legendaries. As he progresses, he gradually transforms into a being with some of the abilities of a legendary Pokemon.
There could be a rogue legendary Pokemon that sees Ash's transformation as a threat to the natural order. This legendary Pokemon, with its own set of motives, could be trying to prevent Ash from becoming a fully - fledged legendary - like being. It might set up various obstacles and battles for Ash, testing his will and strength at every turn.
In a fanfiction where Naruto becomes a Pokemon Trainer, he would bring a whole new dynamic to the Pokemon world. Naruto is used to facing tough opponents in the ninja world, and he would apply that experience in the Pokemon battles. He would be fearless in exploring new areas to find rare Pokemon. His loud and energetic personality would attract a diverse range of Pokemon. His training methods might be unorthodox, but they would likely be effective. For instance, he could use his shadow clone jutsu to train multiple Pokemon at once, just like how he uses it for his own training in the ninja world.
One common theme is power. Both Naruto characters and legendary Pokemon are known for their great power. So, in the fanfictions, there's often a focus on how the combined power of Naruto characters and Pokemon can be used, whether it's for fighting villains or protecting their worlds.
The plot could involve Naruto being on a quest to find all the Legendary Pokemon. Since he has that never - give - up attitude from his own world, he would face all the challenges in the Pokemon world head - on. He could use his chakra to enhance the abilities of the Pokemon he teams up with, creating a whole new power dynamic in battles.
Naruto would probably choose a Pikachu first. Pikachu is energetic and has a lot of spunk, just like Naruto. They would both be full of enthusiasm and would make a great team right from the start.
One popular 'naruto and legendary pokemon fanfiction' is 'Naruto: The Pokemon Trainer'. In this story, Naruto discovers a world of Pokemon and starts his journey as a trainer while still having his ninja skills. It's really interesting to see how he combines his shinobi abilities with Pokemon training.
One possible plot for this fanfiction is that Naruto is transported to the Pokemon universe while on a mission. There, he discovers he has an affinity for training legendary Pokemon. He meets Pikachu first and they form a bond. As he travels, he encounters legendary Pokemon like Articuno. He uses his Naruto - style combat skills to earn the respect of these Pokemon. Eventually, he has to face a powerful villain who wants to use the power of the legendary Pokemon for evil. Naruto, with his new Pokemon friends, battles to save both worlds.