It could be developed through more shared adventures. They might go on a quest to find a special Pokemon or a hidden place. This would give them more time to understand each other better.
After the kiss, their relationship might develop in a more complex way. They could have misunderstandings at times, like when Ash is too focused on his Pokemon training and forgets a date with Serena. But they would learn to communicate better through these experiences. They may also share their past traumas and secrets, which would bring them even closer.
Through shared experiences like traveling to new places. For instance, if they go to a snowy region, they can help each other adapt to the cold and take care of their Pokémon in the new environment. This mutual support can bring them closer.
Well, it could start with Serena being initially shocked but then finding it hilarious when Ash crossdresses as her. This shared moment of laughter can bring them closer. They might start to have more open conversations about their dreams and fears. For example, Ash could share his insecurities about always winning battles, and Serena could comfort him in a new, more intimate way because of this unique situation.
They could also develop their relationship through exploration. If they discover a new and mysterious place, Butterfree can be the one to first scout the area. Ash and Serena then follow based on Butterfree's findings. They can then share their excitement and awe about the new discovery, which would bring them closer together as a team.
It shows their relationship development. The kiss might be a turning point from being just friends to something more. It gives a more romantic aspect to their relationship which was mainly about Pokémon adventures before.
One way to develop their relationship in fanfiction without the impregnation aspect is through shared Pokemon battles. They could team up against powerful opponents, which would strengthen their bond as friends and comrades. This would also stay true to the action - packed nature of the Pokemon world.
After the kiss, they could start secretly dating while still maintaining their superhero personas. They would have to find time between battles and saving the world to be together. This would add an element of secrecy and excitement to their relationship.
Well, after the kiss, perhaps they decide to participate in Pokemon contests together. Serena's expertise in contests and Ash's battle skills could combine in unique ways. They might also meet new friends and rivals along the way, all while their relationship deepens and they face challenges as a couple.
The relationship can be developed through shared battles. For example, they could enter a double - battle tournament. In the heat of the battle, they learn to trust each other's strategies and support one another, which brings them closer.
Ash can be developed by having him gradually notice Serena's yandere tendencies. At first, he might just think she's being a bit overprotective. But as it becomes more extreme, he could start to feel conflicted. For example, he loves Serena as a friend but is starting to be uncomfortable with her actions. This forces him to grow and become more assertive in setting boundaries.
The relationship could start with Ash showing kindness to Spiritomb. For instance, when other Pokémon are scared of Spiritomb, Ash offers it some food. This simple act of kindness can be the first step. Then, as they face challenges together like a big storm or a group of wild Pokémon attacking them, they start to trust each other more. Each time Ash defends Spiritomb or Spiritomb uses its powers to help Ash, their bond gets stronger.