One plot idea could be a young trainer who discovers that their master has a secret past related to a powerful and rare Pokémon. This could lead to adventures as they try to uncover the mystery together. Another idea is that the master is in danger, and the trainer has to use their skills and the bond with their Pokémon to save the master. Maybe the master has a special mission that only the trainer can help with, like protecting a legendary Pokémon's habitat.
You could write about a master pokemon trainer who discovers a hidden ability within a common pokemon species. This discovery could change the way pokemon battles are fought and how trainers view that particular pokemon. For example, a Pidgey with the ability to control the weather in a small area.
One idea could be Ash and his male Pokemon going on a journey through a mysterious new region together. They face challenges that test their bond, like a powerful storm that they have to shelter from in a small cave. Another could be Ash training his male Pokemon in a unique way that no one has ever seen before, leading to the Pokemon evolving in an unexpected way.
Well, a plot could revolve around Janine being involved in a Pokemon tournament where she uses her unique Poison - type Pokemon in unexpected ways. She might face some opponents who underestimate her because of her small stature but she proves them wrong with her brilliant strategies. Or perhaps a story where Janine discovers an ancient Pokemon artifact that has the power to control all Poison - type Pokemon and she has to protect it from evil forces.
A great plot could involve a world where Skin Pokemon are the outcasts because their changing abilities are seen as untrustworthy. A group of trainers decides to prove that Skin Pokemon are just as loyal and worthy as any other type. They form a sort of rescue team for Skin Pokemon in danger and work towards changing the perception of these unique creatures in the Pokemon world.
In a fanfic, they could discover a rare and powerful Pokemon that has the ability to make wishes come true. However, this Pokemon is being hunted by an evil organization. Calem and Serena team up to protect the Pokemon. During their adventure, they share many tender moments, which deepen their love. For example, they might have to spend a night in a cold cave and huddle together for warmth, and in that moment, they confess their true feelings.
One idea could be that Goku arrives in the Pokemon world by some sort of interdimensional rift. He might be confused at first but then start to explore the concept of Pokemon battles. He could use his martial arts skills to train Pokemon in a unique way, like teaching them special combat moves. For example, he could train a Pikachu to use a move similar to his Kamehameha, but in a more Pokemon - friendly version, like an electric blast with a similar charging motion.
Maybe a fanfic where a trainer gets transported into the Pokemon world from our own world. They have to quickly learn the rules and make friends with Pokemon to find a way back home while also exploring the different regions and their unique Pokemon.
One idea could be a Pokemon scientist discovers a new type of Pokemon evolution that is triggered by an unusual environmental factor. For example, a certain type of rare crystal found deep in a cave that causes a Pokemon to evolve into a form never seen before. Another plot could involve a scientist trying to find a way to communicate with Pokemon on a deeper level, perhaps by creating a device that can translate their thoughts. Or, a Pokemon scientist might be on a quest to understand why some Pokemon have unique abilities that seem to go against the known laws of Pokemon biology.
A great plot could involve a group of friends in Alola who enter a Pokemon tournament with their underdog team. They face tough opponents but through their bond with their Pokemon and some clever strategies, they start to make a name for themselves in the tournament. Along the way, they also learn more about the different Alola Pokemon species and their habitats.
Well, you could have a story where a new type of Pokemon is discovered that has vampire - like characteristics, like draining the energy of other Pokemon instead of blood. The main character, a young trainer, has to figure out how to deal with this new threat. Or perhaps there's a vampire Pokemon that was once a normal Pokemon but was cursed. It then tries to find a way to break the curse while befriending a group of trainers.