Who could be the main antagonist in 'ash turns into a female pokemon fanfiction'?

Maybe a powerful and evil pokemon trainer who has a vendetta against Ash. Now that Ash is in a vulnerable pokemon form, this trainer could try to capture and control him. The trainer might have some dark motives related to using Ash's unique situation to gain power in the pokemon world.

It could be a jealous trainer. This trainer might see Ash in his shiny pokemon form and want that power for himself. So he tries to capture Ash by any means necessary, setting up all kinds of traps and challenges for Ash and his friends.

Team Rocket could still be the main antagonists. They might see Ash as a Pikachu and try to capture him more than ever, thinking he's a special Pikachu. Maybe they believe he has some sort of new power because of his transformation.

Perhaps a jealous trainer. This trainer has always been envious of Ash's success and now that Ash is in a vulnerable state as a Zorua, the trainer sees an opportunity to get rid of him for good. The trainer could try to use his own Pokémon to capture Ash or even harm him, making the trainer a formidable antagonist in the story.

Maybe Team Rocket could be the main antagonist. They might see Ash's transformation as an opportunity to finally capture Pikachu. Since Ash is in a more vulnerable state as a girl, they could try to use different tactics to take advantage of the situation.

It could be a Team Rocket member who has obtained a new device. This device was meant to transform Pokemon into other forms for their evil purposes. But by accident, it affects Ash instead. So, this Team Rocket member becomes the main antagonist as he tries to either capture Ash in his new Glaceon form or use him for other devious plans.

Perhaps a dark - type Pokémon that is jealous of Ash's new form. This Pokémon might see Ash as a threat and constantly try to attack him and stop him from getting used to his Latios form.

Maybe a powerful and envious Mewtwo could be the antagonist. Since Ash has now become a Mew, Mewtwo might feel threatened or think that Ash doesn't deserve such power. So, Mewtwo could try to fight Ash to prove his own superiority.

A powerful and corrupt Pokemon trainer could be the antagonist. This trainer is jealous of the boy's unique transformation into a Pokemon. He wants to use the boy's powers for his own gain, like winning all the Pokemon battles and championships. So, he hunts the boy down, causing all sorts of trouble for him during his journey as a Pokemon.

It could be a powerful and evil Pokemon trainer who wants to capture Ash in his new Pokemon form. This trainer might be after Ash because he believes that a human - turned - Pokemon has some special power or value.