Some plot ideas could start with the OC being a Pokemon researcher. They meet Ash and are intrigued by his way of bonding with his Pokemon. Together, they start researching a new and undiscovered Pokemon species in a remote area. Another idea is that the OC has a special Pokemon that can transform into different forms based on emotions. This Pokemon gets lost and Ash helps the OC find it. In the process, they encounter many different Pokemon and trainers. Or perhaps the OC is from a parallel Pokemon universe and accidentally ends up in Ash's world, and they have to find a way to get the OC back home while exploring different regions.
One plot idea could be that Ash's OC partner has a unique ability to communicate with legendary Pokemon. This ability draws the attention of Team Rocket, who try to capture the OC to use their power for evil. Another idea is that the OC is from a far - off region and has a different approach to Pokemon training, which challenges Ash's traditional methods and they learn from each other. A third idea could be that the OC has a mysterious past related to a powerful and lost Pokemon species, and Ash and the OC embark on a journey to discover the truth about it.
Perhaps a plot where Zoey gets lost in an unknown region and Ash goes to find her. Along the journey, they discover new Pokemon species and have to work together to survive. This would create a sense of adventure and build their relationship.
One idea could be that Sawyer and Ash team up for a special Pokemon tournament. They start off as rivals but gradually learn to respect and support each other. Another could be that they go on an adventure to discover a new and rare Pokemon species in a far - off region. Sawyer might initially be skeptical of Ash's methods but in the end, they both benefit from the experience.
One idea could be Ash getting transported into the world of Pokemon Red. He could meet the original Red and they team up to face a new, powerful villain. Maybe a mysterious Pokemon that has powers beyond any they've seen before.
In some fanfictions, Ash and Red might have a friendly rivalry. For example, they could hold a series of Pokemon battles across different terrains to see who is the better trainer. This could involve a lot of training montages for their Pokemon, strategizing about type advantages, and some really exciting battle scenes.
Maybe in the fanfiction, Ash and Gray get lost in an unknown region while on a journey. They must rely on each other and their Pokemon to find their way back. Along the way, they discover a new type of Pokemon and have to figure out how to deal with it. This could lead to some great character development for both of them as they face challenges together.
One idea could be that Ash and Ursula team up for a special Pokemon tournament. They start off as rivals but gradually develop a deep friendship that might turn into something more. Ursula's unique Pokemon training techniques could complement Ash's own style.
One idea could be that Mewtwo and Ash are forced to team up to save the Pokemon world from a new, powerful and evil threat. They start off distrusting each other due to their differences, but as they face challenges together, they begin to understand and respect one another.
One idea could be that Ash discovers a wounded Mewtwo and nurses it back to health. As they spend time together, they form an unbreakable bond that challenges the way both Pokemon and humans interact. Another plot could involve Mewtwo using its powers to help Ash reach a new level of Pokemon training. For example, it could allow Ash to experience telepathic communication with his Pokemon, enhancing their battle strategies.
One idea could be that the OC is a new trainer who arrives in Misty's town. They have a unique type of Pokemon that Misty has never seen before, and she becomes intrigued. As they interact, they go on adventures together, facing challenges that test their skills and friendship, like dealing with a group of wild, powerful Pokemon that are causing trouble in the area.
One idea could be that the OC is a new trainer in the Pokemon world and Serena helps them learn the ropes. For example, Serena could teach the OC about different Pokemon types and how to strategize in battles. Another plot could involve the OC having a special ability that Serena discovers, and they embark on a journey to understand and control this ability together. Maybe the OC can communicate with a rare type of Pokemon, and Serena is intrigued by this.