A great plot could involve Ash having to defend the Kalos region from a new, mysterious threat. Since he's the champion, it's his duty. He has to gather his old and new Pokemon friends to form a powerful team to combat this danger. This would not only show his growth as a trainer but also his leadership skills as a champion.
One idea could be Ash facing off against old rivals who are jealous of his new Kalos champion status. They challenge him in unique battles that test his skills in new ways.
One idea could be Ash facing a new, extremely powerful and mysterious Pokémon in the Kalos region that no one has ever seen before. This Pokémon could be the key to a hidden power within the Kalos champion title. Another plot could involve Ash having to team up with a former rival from his past travels to overcome a threat to the Kalos Pokémon ecosystem. Maybe there's a dark organization trying to disrupt the balance, and Ash's unique bond with his Pokémon is what's needed to stop them.
One possible fanfic could be about Ash's journey to become the Kalos champion. It might start with his arrival in Kalos, full of excitement and determination. He meets new Pokémon and friends along the way. His battles are intense, with him using unique strategies to defeat his opponents and gradually climb the ranks to the championship.
One idea could be a story about a young trainer who discovers a rare and powerful Pokemon in the Kalos region that has been forgotten by history. This Pokemon could have unique abilities that attract the attention of both good and bad characters.
A great plot could involve Ash and Red exploring the mysteries of the Kalos region. They discover ancient Pokémon secrets or a hidden power that threatens the balance of the region. Together, they embark on a journey to find a way to stop this threat, facing various obstacles and making new friends along the way. This would not only showcase their courage but also their ability to work together.
A great plot twist could be that the Kalos champion turns out to be an impostor. Ash discovers this during his journey towards the championship. This would mean that all the battles leading up to the championship were based on a false premise. Ash then has to not only expose the impostor but also face the real champion in a series of unforeseen challenges. Also, there could be a twist where Ash's Pikachu loses its ability to use electricity temporarily, forcing Ash to rely on his other Pokémon in new and creative ways.
One plot idea could be that a powerful Pokemon is corrupted by an Infinity Stone - like object. The Avengers, who are familiar with the power of the Stones, team up with the Pokemon Champions to purify the Pokemon. The Champions know how to communicate with Pokemon on a deeper level, which helps in the process.
Well, you could have a plot where a young trainer in Kalos dreams of becoming the Pokemon Master but has a unique ability to communicate with Pokemon in a different way than others. This leads to some misunderstandings at first but eventually helps in solving a big problem in the Kalos region, like a natural disaster that is affecting Pokemon habitats. The trainer could team up with different types of Pokemon, including some that are not commonly used in battles, to overcome the challenges.
An interesting OC for a Pokemon Kalos fanfic could be a young artist who uses their Pokemon as models for their art. They travel around Kalos in search of inspiration and different Pokemon species to paint. Along the way, they meet other trainers and get involved in battles not just for victory but also to observe how Pokemon move and interact, which helps them in their art. This OC could also have a Pokemon with a unique coloration that they discovered during their travels.
Well, a great plot might be that Ash discovers Meloetta has a unique ability to communicate with ancient Pokemon. They embark on a journey to an ancient ruin to find a hidden treasure that can help save the Pokemon world from a new, mysterious danger. Along the way, Ash has to protect Meloetta from other trainers who want to capture it for its rare powers. It would be full of adventure and discovery.
One key element is the battles. Since it's about Ash as the Kalos champion, the battles need to be exciting and well - described. His Pokémon's moves, the strategies he uses, and the reactions of the opponents are all important. Another element is the relationships. His friendship with his Pokémon, his human friends in Kalos like Serena, Clemont, and Bonnie. And also his relationship with the Kalos region itself, how he explores and falls in love with the place.