In fanfiction where Ash turns into a Pokemon, there are numerous possibilities. One is that he could form a deeper bond with other Pokemon. Since he is now one of them, they might trust him more instinctively. He could also be hunted by some trainers who see him as a rare or powerful Pokemon. This would put him in a difficult situation where he has to avoid capture while still trying to live as a Pokemon. And his old friends like Pikachu might have a hard time adjusting to this new Ash - Pokemon hybrid existence.
Well, perhaps Ash could gain new and amazing powers. Shiny pokemon often have special abilities or appearances, so if Ash turns into one, he might be able to fly like a shiny bird - type pokemon or have super strength like a shiny fighting - type. He could also use his new form to communicate better with pokemon, since he'd be more like them.
Perhaps Ash, as a Victini, would attract a lot of attention from other Pokémon and trainers. Some might see him as a symbol of hope and victory, while others could be jealous or even try to capture him for his powers. His friends, like Pikachu, might be initially confused but would eventually learn to accept this new form of Ash and help him navigate the challenges that come with being a Victini.
Well, he might start to see the world from a Pokemon's perspective. For example, he could understand their communication better and form closer bonds with them. He may also face new challenges like having to adapt to living in a Pokeball or dealing with the natural instincts of his new Pokemon form.
In a Pokemon Ash turns evil fanfiction, he might start using his Pokemon for wrong purposes. For example, instead of battling for sport and friendship, he could use them to steal from other trainers or take over Pokemon Centers. His Pikachu, usually so loyal, might be conflicted about following his new, evil ways.
A lot could change. His fashion sense might be completely different. Instead of his usual cap and jacket, he could be wearing more feminine outfits. His Pokémon might need to get used to this new look too. Pikachu might be a bit confused at first but then adapt. Also, Ash's rivals might not take him as seriously at first when he's a girl, but he could prove them wrong with his skills.
Well, if Ash turns into a Pokemon in a fanfic, he might gain new abilities. For example, he could use Pokemon moves like Pikachu's Thunderbolt. He'd also have a different perspective on the Pokemon world. Maybe he'd understand their language better and be able to communicate with them more easily. This could lead to new adventures where he teams up with other Pokemon in ways he couldn't before.
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.
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.
Maybe Ash as a Vulpix gets adopted by a group of wild Vulpix. He has to learn their ways and how to survive in the wild. He could also learn some unique Vulpix - only skills that he can later use when he turns back to his human form.