A cool plot could be that Ash turns into a Eevee. Since Eevee can evolve into multiple forms, Ash - as an Eevee - would constantly be in a state of potential change. Other Pokemon might try to influence his evolution in different directions. His friends would be on a quest to find a way to turn him back, but in the process, Ash - as Eevee - discovers that he can access some of his old human memories and use his strategic thinking in Pokemon battles. This gives him an edge in the wild and helps him protect himself and his new Pokemon friends.
In this fanfiction, if Ash turns into a pokemon, perhaps he becomes a Charmander. He could struggle with being in a different form. He might have to adapt to the life of a fire - type pokemon, facing challenges like being weak against water - type attacks and trying to find a way to change back while still having adventures with his friends, who now have to protect him in a different way.
In the fanfiction where Ash turns into a Gardevoir, his journey would take a very different turn. Gardevoir has a strong connection to the Fairy type, so Ash might develop a new affinity for Fairy - type Pokemon. He could use Gardevoir's powers to sense the emotions of others more clearly. This would help him in both battles and in making friends. His fighting style would become more graceful and strategic, relying on Gardevoir's psychic and Fairy - type moves. It would be an exciting transformation to explore in the fanfiction world.
In a fanfiction where Ash turns into a hedgehog, it could be a wild ride. Firstly, his appearance would be completely different. He'd be small and furry with spines. This could make it difficult for him to travel as he used to. His clothing would probably be all wrong for his new form too. Regarding his Pokémon battles, he'd have to come up with new strategies. Instead of standing on the sidelines and giving commands, he might be able to directly participate in a more physical way, using his hedgehog body to dodge attacks or even launch small counter - attacks. It would definitely add a whole new dimension to the Pokémon world in that fanfiction.
Well, it could be that Ash's transformation into a Pokémon gives him unique abilities. Maybe he can communicate with Pokémon in a new way and goes on an adventure to discover the reason for his transformation. However, 'lemon' in fanfiction often implies inappropriate content, so if we assume a non - inappropriate version, his new form might also lead to him having to prove himself to his friends all over again.
The story would become more about Ash adapting to his new form. He'd have to learn how to move, eat, and sleep like a Pokemon.
Well, if Ash were to turn into Mew in a fanfiction, it would be quite a wild turn of events. Mew is known for its ability to transform and its vast psychic capabilities. Ash, with his new form, could potentially travel to different dimensions that were previously inaccessible. He could also communicate with Pokémon in a whole new way, using Mew's psychic powers to understand their deepest thoughts and feelings.
Well, if Ash turns into a Pikachu in a fanfiction, it would be quite a transformation. Firstly, his communication with Pikachu would become more of an internal dialogue. And he'd have to get used to moving around on all fours and using Pikachu - like movements. His battles would be completely different too. He'd be relying on Pikachu's natural skills rather than his own battle strategies as a human trainer.
In fanfiction where Ash turns into a girl, it could lead to some interesting plot twists. Maybe his relationships with his Pokémon would change in unique ways. For example, some Pokémon might be more protective of him now that he's a girl. Also, his interactions with other trainers, like Misty and Brock, would be different. They might treat him with more chivalry or have different emotional responses to his new form.
One possible plot could be that Ash gets hit by a strange Pokemon move during a battle. This move has a side - effect of changing his gender. As a female, Ash discovers new perspectives within the Pokemon world. She might form different relationships with her Pokemon, especially the female ones who now see her as one of their own. She could also face challenges from other trainers who underestimate her because she's now a girl, but she uses her newfound determination and different approach to battles to prove them wrong.
Well, in such a fanfic, a cool plot point might be that Ash, as a Pikachu, has to communicate differently. Since he can't talk like a human anymore, he has to find new ways to convey his thoughts and ideas to his friends. Also, there could be a plot where he discovers new powers that normal Pikachu don't have because he was once human. For example, he might be able to strategize better than a regular Pikachu in battles.