A fanfiction could center around Ash having a special training session with the Cerulean Sisters. Since they are known for their water - type Pokémon, they could teach Ash some unique techniques for his own water - type Pokémon. This could lead to Ash's Pokémon evolving or becoming stronger in unexpected ways, and also strengthen the bond between Ash and the sisters.
In this fanfiction, the Cerulean Sisters could be in trouble with a rival gym. Ash decides to stand by their side and help them defend their reputation. He trains with them, shares his Pokémon training methods, and together they face the rival gym in a series of intense battles. This not only showcases Ash's loyalty but also his growth as a trainer.
In this fanfiction concept, Ash's adoption could be a very heartwarming story. Maybe he meets an orphaned child during his travels. Ash, with his kind heart, decides to take the child under his wing. It could be a chance for him to pass on his knowledge of Pokemon and values like friendship and perseverance.
In a fanfiction of Ash in the Unova League, it could focus on his relationships with his Pokemon during this journey. Maybe Pikachu has a special moment of growth, or he catches a new and rare Pokemon that becomes crucial in his battles in the league.
One possible fanfiction could be about Ash finally facing the Elite Four after a long journey of training. He might have new and powerful Pokémon by his side, and the battles could be intense. For example, his Pikachu could have evolved into a new form, giving him an edge against the Elite Four's strong Pokémon.
One possible story could be that Ash and Dawn meet in Kalos and decide to team up for a Pokemon tournament. They bring their unique skills and Pokemon from their respective regions and face many challenges along the way, like dealing with tough opponents and adapting to the new Kalos Pokemon.
One possible fanfiction could be about Ash forming a special bond with Salamence. Maybe Salamence is a wild Pokemon that Ash manages to befriend through his kindness and understanding, which is different from his usual way of catching Pokemon. This could lead to an adventure where they face a powerful enemy together and Salamence's unique abilities help them win.
If Team Rocket turns Ash into a Pokemon, it could lead to a really interesting story. Ash would have to experience the world from a Pokemon's perspective. He'd understand their struggles, like being caught and trained. This could also be a way for him to better understand his own Pokemon and their bond with him. And it would be a wild adventure as he tries to find a way to turn back to his human form.
I'm not a big fan of the'slave' concept in fanfiction as it often goes against the positive and friendly nature of the Pokemon world. However, some might write such fanfictions to explore power dynamics in a different way. But it's important to note that this is not in line with the main themes of the Pokemon series.
One possible scenario in this fan fiction could be that Ash has some sort of special ability or connection that attracts only shiny Pokemon. Maybe it's a hidden power within him that he discovers early on in his journey. For example, when he first starts out in Pallet Town, instead of the regular Pikachu, a shiny Pikachu is drawn to him. This would set the stage for his entire journey filled with shiny Pokemon encounters.
One possible fanfiction could be about Kirby befriending the Three Mage Sisters. Kirby might go on an adventure with them to save their magical land from a new threat. Maybe they have to combine Kirby's unique abilities with the sisters' magic to defeat the enemy.