One possible plot could be that the OC, now as Ash, has all the knowledge from their previous life. They might use this to train their Pokémon more effectively. For example, they could quickly figure out the best training regime for Pikachu, making it even stronger than in the original series. They could also have different strategies in Pokémon battles, using their prior knowledge of different Pokémon types and moves to their advantage.
They could impact it by introducing new training methods. For instance, if the OC had knowledge of modern sports training techniques, they could apply some of those concepts to Pokémon training. This might lead to Pokémon evolving faster or developing new moves. The Pokémon battles in the world would become more exciting and unpredictable as a result.
One possible plot could be that Naruto, with his ninja skills and determination, takes on the Pokemon world as Ash. He might use his combat experience to develop unique battle strategies in Pokemon battles. For example, he could incorporate his shadow clone jutsu in some way, like using clones to distract opponents' Pokemon while his own Pokemon attacks from an unexpected angle.
Naruto's chakra control could be related to how Ash controls the energy flow in his Pokemon. Maybe he could use his chakra knowledge to enhance his Pokemon's attacks or defenses. Also, his ability to learn jutsus quickly might turn into an ability for Ash to quickly understand and train his Pokemon for new moves.
Maybe a new, mysterious villain who has a grudge against Ash or wants to use his skills for their own evil purposes. This villain might be from a far - off region and has special powers that allow them to hypnotize people. They see Ash as a useful tool to carry out their plans in the Pokémon world.
His rival, Gary, could be a likely candidate. Gary has always been competitive with Ash, and in this fanfiction, his jealousy could reach a boiling point, causing him to betray Ash for his own gain, like trying to steal his Pokémon or get credit for his achievements.
Ash could become more confident and wise as a Dragon Master. His decision - making skills would improve as he deals with powerful and often unpredictable dragon Pokémon.
One popular 'Ash Ketchum OC Indigo' fanfiction could be 'The Indigo Adventure of Ash and His New Friend'. It might involve Ash meeting an original character (OC) in the Indigo region and going on exciting Pokémon battles and adventures together. Another could be 'Indigo's Hidden Gem with Ash Ketchum', where the OC has a special power or ability that helps Ash in his journey in the Indigo League.
Fanfiction can also take a more comical approach. Picture Ash and Jessie accidentally swapping bodies or getting stuck in a Pokemon's body. This would lead to all sorts of hilarious misunderstandings and attempts to get back to normal. It would be a fun and light - hearted way to explore their characters in a different context.
Yes, there might be some 'Ash Ketchum bullied' fanfiction out there. Fanfiction often explores various scenarios, and unfortunately, bullying can be one of them. Some authors might be interested in creating stories where Ash Ketchum faces bullying to show his character development in difficult situations or to explore darker themes within the Pokémon universe.