One common theme is their first encounter as children. It could be a cute, chance meeting in a forest or at a Pokémon event. Another theme is their shared dreams as kids, like Ash's dream of becoming a Pokémon Master and how Serena might be inspired by it or have her own related dreams.
The theme of friendship starting from childhood is also prevalent. It shows how they grow closer over time, sharing secrets, having adventures together, and relying on each other. For example, they might help each other catch their first Pokémon as children. Also, there could be themes related to family. Maybe Serena's family has an influence on her relationship with Ash during their childhood, or Ash's absent father could be a part of the backstory in some fanfictions.
Adventure is also a big theme. In the Pokemon world, they go on various adventures, and fanfictions expand on these. For example, they might encounter rare Pokemon or face new and powerful trainers. Also, the theme of self - discovery is present. Serena may discover more about herself through her relationship with Ash, and vice versa. In some fanfictions, they also deal with the theme of sacrifice, like sacrificing personal goals for the sake of their friendship or the greater good in the Pokemon world.
A lot of fanfictions also focus on Serena's growth as a character. For instance, how she becomes a stronger trainer or overcomes her insecurities with Ash's support. And sometimes, there are alternate universe stories where their relationship or their Pokemon journeys take a completely different turn.
One common theme is friendship. Since they are all from the Pokémon world, their friendships and how they support each other during their Pokémon journeys are often explored. For example, they might help each other train their Pokémon or face tough opponents together.
One common theme is adventure. Writers often take them on exciting quests or journeys together, exploring new places and facing various challenges.
The theme of self - discovery is also quite common. Ash may have realized his true feelings for Serena while on his travels, and Serena might have also discovered more about herself in his absence. Additionally, the theme of friendship is often intertwined. Their past friendship forms the basis for their new relationship when Ash returns.
One common theme is the growth of their relationship. It often starts with Serena having a crush on Ash and then Ash slowly realizing his feelings for her. Another theme is adventure. Since they are both Pokemon trainers, they go on adventures together and these experiences strengthen their bond. For example, in many fanfictions, they face tough battles side by side which deepens their connection.
One common theme is friendship. They often go on adventures together, and the fanfictions show how their friendship develops. Another theme is Pokémon training. They share their experiences and learn from each other about training different Pokémon.
A common theme is the growth of their relationship. It starts with Serena having a crush on Ash and gradually winning his heart. Another theme is the support they give each other in their Pokémon training. They encourage one another to become better trainers, which also strengthens their bond of love.
Friendship is a huge theme. In many fanfictions, it shows how Ash, Serena and Bonnie become closer friends over time. Adventure is also prevalent, with them traveling to different regions and facing various challenges. Additionally, the theme of dreams is often there. Ash's dream of becoming a Pokémon Master, Serena's dream of being a top Pokémon performer, and Bonnie's dream of finding a special Pokémon all play important roles in the stories.
Love is also a prevalent theme. Whether it's a budding romantic love or a deep platonic love, Ash's comfort towards Serena can be seen as an expression of his feelings. In some fanfictions, his comfort is a way to show his hidden love for her.