The 'ash turns into a latias fanfic' could have a plot where Ash is turned into Latias by an ancient spell. In his new form, he discovers that he can teleport to different regions easily. He then uses this ability to search for rare items or secrets that could help him turn back into his human form, all while making new Pokemon friends along the way.
In this fanfic, perhaps Ash's transformation into Latias is due to some experiment gone wrong. As a Latias, he could start to understand the language of other Pokemon in a more intimate way. He might use his new form to help his friends in battles, flying them to safety or using his psychic powers to outwit opponents.
Well, it could be about Ash somehow magically being transformed into a Latias. Maybe he then has to deal with the powers and instincts that come with being a Latias. He might try to find a way to turn back while also exploring the world from a new perspective as a Pokemon.
There could be a mad scientist - type character who created the situation where Ash turned into a Latias in the first place. But then, this character wants to keep Ash in that form to study him and use his new - found Pokemon abilities for their own gain. They would be the main obstacle for Ash in his journey to turn back into a human.
Well, perhaps in the fanfic, Ash turns into a girl because of a curse. As a girl, Ash could start to see the Pokemon world from a different perspective. Maybe she would form new relationships with her friends, like Pikachu being more protective. And she might have to enter Pokemon contests instead of battles at first due to the new appearance, but then find a way to get back into battles and show that she's still the same strong trainer inside.
In this fanfiction, it might be that Latias controls Ash as part of an experiment. Latias is a curious Pokémon and wants to see how a human like Ash would react in different scenarios. So she uses her powers to make Ash explore areas he might not have otherwise, like a hidden and mysterious part of the Pokémon world. This could lead to Ash discovering new Pokémon species or even new types of Poké Balls. As he's being controlled, his initial fear turns into a sense of adventure as he experiences things he never thought possible.
One possible plot could be that Ash turns into Pikachu and has to learn how to communicate with his human friends in this new form. He might struggle at first, but then discovers that he can use his Pikachu abilities in unique ways to help the group in battles and in solving problems around them.
The plot might involve Ash, as a female, trying to find her place in the Pokemon league again. Since she has a new form, she might have to re - establish her reputation. She could form new alliances with other trainers who see her in a different light. For example, some male trainers might be more protective or some female trainers might be more competitive towards her. And along the way, she discovers new abilities or a different connection with her Pokemon that was hidden before the transformation.
One possible plot could be that there is some sort of a prophecy in the Pokémon world that foretells the birth of a special baby from a human and a legendary Pokémon like Latias. Ash gets involved in this prophecy without knowing at first. As the relationship between Ash and Latias develops, they find out about the baby. The baby could have a great destiny, like being the bridge between different Pokémon species and humans. Ash would have to teach the baby about the values he believes in, like friendship and perseverance.
A plot could start with Latias being in some kind of danger, and Ash comes to her rescue. This leads to them spending more time together. As they get to know each other better, they realize their feelings are more than just friendship. After getting married, they might have to deal with people or Pokemon who don't approve of their relationship at first. But through their kindness and the strength of their love, they win them over and continue their happy life together.
Well, it could be that Latias has been influenced by an ancient prophecy. According to this prophecy, Ash is the key to unlocking a great power. But she can't just ask Ash to come with her as she fears he will be stopped by his friends or other Pokémon trainers. So, she decides to kidnap him. As time passes, Ash manages to communicate with Latias and understand her motives. He then decides to cooperate with her, not because he has to, but because he realizes the importance of the situation.
One idea could be that Ash and Latias team up to save a group of Pokémon from an evil organization. Ash uses his battle skills and Latias uses her psychic powers.
Perhaps in this fanfiction, Ash goes to the town in search of a rare Pokemon item. But when he arrives, he discovers that Latias and Latios are in trouble because of some evil forces. So, Ash decides to help them out. He uses his battle skills and knowledge of Pokemon to fight against these forces. Along the way, he also learns about the unique culture and traditions of the town.