If Naruto becomes a Pokemon fanfiction, it could go like this. Naruto, being his curious self, would be intrigued by the concept of Pokemon. He might meet some Pokemon trainers who teach him the ropes. His natural leadership skills would help him in leading his Pokemon team. He could also bring some of his ninja tools and incorporate them into his Pokemon training and battles. For instance, using his kunai to mark the location of wild Pokemon. His journey would be filled with new adventures, making friends with other trainers, and learning about the different regions in the Pokemon world.
In a fanfiction, Naruto could be exposed to a new form of chakra or energy similar to Raiden's electricity - based powers. This exposure could lead him to study Raiden's combat style. For example, Raiden's ability to move at high speeds and his proficiency with a sword could inspire Naruto to incorporate new techniques into his own fighting repertoire, thus making him a Raiden fan.
One way could be through a strange crossover event. Maybe Naruto gets sucked into the Bleach universe and is somehow influenced by the power and allure of the Espada. He could start to adapt their fighting styles, for example, learning from their use of reiatsu and zanpakuto - like abilities. This would change his approach to battles in the Naruto world when he eventually returns.
One way could be through a time - travel or dimension - hopping plot device. Maybe Naruto gets sent to the Mega Man universe and is immediately fascinated by the high - tech world and Mega Man's heroic deeds. He starts learning about the different robots and their functions, and decides to become a fan. Another idea is that some kind of crossover event occurs in Naruto's own world. For example, a strange artifact is discovered that contains knowledge of the Mega Man universe, and Naruto, being the curious ninja he is, delves into it and becomes a fan.
Well, he might use his ninja skills to catch Pokemon in unique ways. For example, he could use his shadow clone jutsu to surround a Pokemon and catch it more easily. His ability to endure tough situations would also make him a great Pokemon trainer in this fanfic scenario.
Well, one way could be that Naruto, with his newfound Sith powers, starts to view the Hidden Leaf Village in a different light. He might see the shinobi system as a form of oppression, much like how the Sith view the Jedi Order in Star Wars. He could then start to secretly gather followers among those who feel disenfranchised in the village.
Well, one way could be Sonic discovers Batman's comics in his world. Maybe Tails finds some strange artifacts that turn out to be from another dimension where Batman exists. Sonic reads the comics and is intrigued by Batman's determination and his no - kill rule. He starts to idolize Batman and tries to incorporate some of Batman's detective skills into his own adventures.
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 way could be to make Naruto and his friends into SCP - like characters. Naruto's ability to use chakra could be seen as an anomalous power that needs to be studied and contained. The Leaf Village could be like a Foundation site, and they have to deal with other villages as if they were other 'threats' in the SCP universe. For example, Orochimaru could be a more menacing and SCP - style villain, with his experiments being even more grotesque and dangerous.
One way could be through some sort of magical or spiritual accident. Maybe a powerful demon or wizard accidentally casts a spell that transports Naruto's soul into Sesshomaru's world and into his body. Naruto's willpower and his own chakra system could then start to influence Sesshomaru's body in unique ways.
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.