Well, in my opinion, Team Rocket's Jessie, James, and Meowth are always great to include. Their comical yet persistent attempts to steal Pokemon can create some hilarious and action - packed scenes in a 'pokemon xy the game fanfic'. Also, Diantha, the champion in the 'xy' region, can be a powerful and inspiring character to write about, whether as a mentor or an antagonist depending on the plot.
Definitely Ash and his Pikachu. They are iconic in the Pokemon world and having them in a 'pokemon xy' fanfic can add a sense of familiarity and excitement. Serena is also a popular choice as she has her own charm and goals in the 'xy' series. Another character could be Clemont, with his inventions adding an interesting technological aspect to the story.
Serena is often a popular character. She has her own dreams and goals related to Pokemon performances, and her journey in the XY adventures can be really engaging to read about.
The player character is of course important. Then there are the Gym leaders like Viola, Grant, etc. They are crucial as they test your skills. Professor Sycamore is also very important as he gives you your starter Pokemon and offers guidance throughout your journey. And there are the antagonists from Team Flare, like Lysandre. He has his own motives that drive the story's conflict.
Ash is always a popular choice. His experience and determination can add a lot to a fanfic. You can create new adventures for him, like facing a powerful, never - before - seen Legendary Pokemon.
In Pokemon, Pikachu is always a popular choice. It's the mascot of the franchise and super recognizable. In Digimon, Agumon is really popular. So including them in a fanfic would draw a lot of readers. Also, characters like Ash from Pokemon and Tai from Digimon are well - loved and would be great to have in a crossover fanfic as they could lead the combined adventures.
Ash Ketchum is always a popular choice. His long - running journey through different Pokemon generations provides a lot of material for fanfic writers. You can write about his new adventures, or what if scenarios like what if he had chosen a different starter Pokemon in a certain generation.
The main character from the game, of course, is a popular choice. Also, Cyrus from Team Galactic is often included as he is such a complex and interesting villain. And Dawn or Lucas, depending on the version, are great to have as they are the typical Pokemon trainers that players can relate to.
Ash Ketchum is a classic choice. His experiences and growth throughout his journey can serve as inspiration or even be part of a parallel story in the fanfic. You could also include his Pikachu, which is an iconic Pokemon.
Definitely Serena. She's a well - known character from the Kalos region. Her journey as a Pokemon trainer and her relationship with Ash can be explored further in a fanfic.
Pikachu is always a popular choice. It's so well - known and cute, and imagining it in a transformation scenario, like turning into a human or another Pokemon, can be really interesting. Another popular character would be Charizard. Its cool and powerful look makes for great transformation stories. And of course, Mewtwo. Given its mysterious origin and powerful psychic abilities, a TG story involving Mewtwo could be very engaging.
One idea could be a story where the protagonist's starter Pokemon has a rare hidden ability that they discover during a crucial battle. This ability gives them an edge and changes the course of the battle and the overall story. Another idea is a fanfic that focuses on the relationship between the Pokemon and their trainers in the 'pokemon xy' game world, exploring how they communicate and support each other on their journey.