A common theme in such fanfictions could be Ash's adventures in Alola while building relationships with different characters. Maybe he forms special bonds with his Pokémon and the people around him in a more romantic or friendship - deepening way.
One great 'Pokemon Ash Alola' fanfiction is 'Ash's Alolan Adventure'. It has Ash making unique friendships in Alola and facing new Pokemon challenges. The story really captures the essence of the Alola region with its beautiful descriptions.
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.
In a fanfiction about Ash's reunion in Alola, perhaps he comes back to help with an ecological problem. The Alola region's unique ecosystem is in danger, and his friends call him for his expertise. Ash brings along some of his other Pokemon from his travels, and together they work to save the day while also having a great time catching up.
I'm not sure which specific 'Pokemon Ash Alola lemon fanfiction' you're referring to. There are a lot of fan - made stories out there. Some might focus on Ash's adventures in Alola with unique twists and character interactions that are not in the official canon. However, lemon - themed fanfictions often contain inappropriate or adult - oriented content, so I'd recommend looking for more family - friendly fan works instead.
One aspect could be the development of their relationship. Ash is always making friends, and with Anabel in Alola, they might have a special bond. They could learn from each other, like Ash teaching Anabel some of his unorthodox battle tactics, and Anabel showing Ash more about the mysterious aspects of Pokemon in Alola.
A common theme could be Ash's exploration of the Alola region. The beautiful islands, diverse Pokemon, and unique ecosystems offer a lot of creative potential. Writers might focus on how Ash discovers hidden areas and the Pokemon within them.
One idea could be that Ash's victory in the Alola League is due to his strong bond with his Pokémon. His Pikachu, for example, could have evolved a new move during the final battle that gave them the edge. Another idea is that Ash's experience from all his previous regions finally culminates in this victory, and he uses strategies he learned along the way.
In such a fanfiction, perhaps Ash could be betrayed by his friends in Alola. Maybe they misunderstand his actions or are influenced by some false information. For example, they might think Ash is secretly working for an enemy, which leads to the betrayal.
One great 'Pokemon Ash Alola Champion' fanfiction is 'The Alola Ascent'. It beautifully details Ash's journey to becoming champion in Alola, with unique character developments and exciting battles. Another is 'Ash's Alola Legacy' which focuses on how he changes the perception of being a champion in the Alola region. There are also many on fanfiction.net that you can explore.