You can try fanfiction websites like FanFiction.net or Archive of Our Own. They have a large collection of Pokémon - related fanfictions, and you might be able to find some 'Ash werepokemon' ones by using the search function and typing in relevant keywords.
In some 'Ash werepokemon fanfiction', Ash could transform into an Eevee. As an Eevee, he would be small and vulnerable, but also have the potential to evolve into different forms. This could create an interesting story arc as he tries to decide which evolution path to take while in this new form.
Ash could be a Pokémon trainer with a different starting point in this fanfiction. Born in 1987, by 1997 he might have already made a name for himself in local Pokémon battles. He could have a team of Pokémon that he rescued from difficult situations, like a Charmander that was abandoned by its trainer. His story could revolve around giving these Pokémon a second chance and proving that Pokémon don't need to be 'perfect' to be strong.
In a fanfiction about Ash born in 1987 and his situation in 1997, we could see an alternate story where Ash is not the typical rookie trainer. Since he's a bit older than in the original, he might be more knowledgeable about Pokémon lore. He could be on a quest to uncover some ancient Pokémon secrets in 1997. He might travel to different regions, not just for battles but also to study old Pokémon texts and artifacts, and along the way, form an unusual team of Pokémon that are attracted to his in - depth knowledge.
One popular aspect of Alola fanfiction with Ash could be his growth as a trainer. In the Alola region, Ash had unique experiences. Fanfiction might explore how he further developed his skills, formed new bonds with Pokemon, and interacted with the local culture. For example, his relationship with Pikachu might be delved into deeper, showing how they overcame new challenges together in the Alola setting.
May could be considered a good match for Ash in fanfiction. She has a tomboyish charm and her own set of Pokémon skills. Their journey together in the anime provides a lot of material for fanfiction writers. They've had moments of competition and cooperation, which can be explored more deeply in fanfiction. However, Dawn also has her own appeal. She's elegant and has a passion for contests, and her relationship with Ash can add a different flavor to the fanfiction, like a more refined kind of partnership.
Ash could get angry. He has a strong sense of justice, and he might feel that May has violated their friendship. He could challenge her, not in a violent way, but more in a way to get an explanation and to try to make her see the error of her ways. He would likely be determined to show her that what she did was wrong.
Ash is a well - known Pokémon trainer, always eager to catch new Pokémon and battle strong opponents. He has a kind heart and is very passionate about Pokémon. Dawn is another trainer, who is often shown to be determined and has her own unique style of training. In the 'dawn confesses to ash fanfiction', their relationship takes a turn towards the romantic as Dawn decides to be honest about her feelings for Ash.
Ash might meet a strict teacher who has no idea about Pokémon at first but gradually becomes interested in them. He could also meet a rival in school who challenges him not only in academics but also in Pokémon battles.
Some fanfictions might have Misty betray Ash. Perhaps she gets lured by the promise of power or some valuable reward. She could be tricked into believing that Ash is no longer the friend she thought he was and that betraying him is for the greater good.
In some fanfictions, Ash can touch Pokémon to show a deeper bond. It might be a way for the author to create more emotional and physical interactions between Ash and his Pokémon pals, different from the normal anime where physical contact like hugs is not as common.