One common theme is adventure. Since Ash is often on his Pokemon journey, the fanfictions might include Absol joining him on his adventures, and their relationship growing during those travels.
Another theme could be the discovery of new feelings. Ash might not have expected to fall in love with Absol, and the fanfiction could focus on how he comes to terms with these new emotions, while Absol might also be experiencing similar things, leading to a heartwarming and sometimes complex relationship development.
One common theme is friendship. The transformation of Absol into an anthro form often leads to a deeper bond with Ash. They might go on adventures together and support each other, showing how friendship can transcend species boundaries even in a transformed state.
One common theme is Ash gaining new powers through the transformation. He might use these powers to overcome tough battles in the Pokémon world.
One common theme could be the beauty of Absol in a unique way. Maybe it's about how its appearance stands out in the Pokémon world. Another theme might be a relationship between Absol and a trainer, focusing on how the trainer discovers the beauty of Absol, not just physically but also in terms of its personality.
Survival is also a theme. They could be in a situation where they have to rely on each other to survive in a harsh environment, like a post - apocalyptic world or a dangerous, unexplored territory.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can search for 'Ash and Absol love' in the search bar. There are likely to be many works there.
Another theme could be the relationship between the female Absol and a trainer. This might involve themes of trust, growth, and friendship as they journey together through the Pokemon world. Maybe the trainer initially misunderstands the Absol due to its somewhat intimidating appearance, but they gradually form a deep bond.
A very common theme is the power of love. In these fanfictions, their love for each other often gives them the strength to overcome difficulties. For example, in some stories, when facing a powerful Pokémon or a tough opponent, their love gives them the motivation to keep going. It also shows how love can change a person for the better, like Ash might become more gentle and Bianca more confident because of their love.
One common theme is adventure. Since Ash is often associated with his Pokémon - journey, fanfictions might incorporate their love story within his travels. Another theme could be growth, both in their relationship and as individuals.
One common theme could be overcoming obstacles. Maybe they come from different backgrounds or have different goals in life, and the fanfiction focuses on how they overcome these differences to be together.
One common theme could be adventure. Since Ash is often associated with adventures in his original story, fanfictions might incorporate their love story within the framework of an adventure. For example, they could be on a journey together and their relationship develops along the way.