One common theme could be friendship turned into something more. Since Ash and Gary have a pre - existing relationship in the Pokémon world, in these fics, it might be about how that relationship evolves into a romantic one when Gary is female. Another theme could be the exploration of their different personalities and how they complement each other.
Character development is a key characteristic. As the story progresses, we see Ash and Gary change and grow, not just as Pokémon trainers, but also in how they view each other. There can be a lot of emotional depth, from anger and jealousy in their rivalry to understanding and even love in their friendship.
To find good Gary x Ash yaoi fanfic, start by looking at popular fanfic platforms. Check the reviews and ratings of different stories. A high - rated story is more likely to be well - written. Also, look for fanfics that are updated regularly, as it shows the author's commitment. Another tip is to search for fanfics written by authors who are known for their good characterizations. They are more likely to do justice to Gary and Ash's personalities in a yaoi context.
Typically, in an 'Ash x Gary lemon fanfic', there would be a strong focus on the relationship between Ash and Gary. It might include a lot of emotional moments between them, exploring their feelings towards each other more deeply than in the original Pokémon series.
I'm not sure of specific 'Ash x Female Gary fanfic' stories off the top of my head. But you could try searching on fanfiction websites like Archive of Our Own. They have a large collection of fan - created stories, and you might be able to find some there.
One common theme is friendship. Since Ash and Gary have a long - standing relationship in the Pokémon world, fics might focus on the deepening of their friendship in a fluffy way. For example, they could have heart - to - heart conversations or support each other during difficult times.
One great 'gary x ash fanfic' story could be 'The Rival's Reunion'. It focuses on Gary and Ash meeting again after a long time apart and having to work together on a special Pokémon research project. Their old rivalry resurfaces but also evolves into a deeper understanding of each other.
One common theme could be rivalry turned into romance. Since in the original Pokemon series, Ash and Gary have a competitive relationship, in fem Ash x Gary fanfics, this can be developed into a more romantic rivalry.
I'm not sure about specific 'gary x ash lemon fanfic' as I haven't come across many. You could try searching on some popular fanfic platforms like Archive of Our Own. Maybe you'll find some interesting ones there.