There might be a story where Ash has a special connection with Cresselia. For example, Cresselia might choose Ash to be its partner in a tournament. Ash then has to train hard with Cresselia's guidance and they form a strong bond during the process.
One common theme is adventure. Ash and Cresselia might go on an adventure together, exploring new regions in the Pokémon world, facing challenges and making new discoveries.
Another option is to ask in Pokémon fan communities on social media platforms like Facebook or Twitter. There are often groups or hashtags related to Pokémon fanfiction, and someone might be able to point you in the right direction for some high - quality cresselia x ash fanfiction.
You can try fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide range of fanfictions, including those about Ash and Cresselia. Just use their search functions to look for the specific pairing.
In many 'ash and cresselia lemon fanfiction', a recurring theme is often the power dynamics. Cresselia being a mythical Pokémon might have certain powers that interact with Ash's skills and determination. This can lead to themes of mutual growth and understanding. Another theme could be the discovery of new Pokémon worlds or realms in relation to their encounters. Since Cresselia is associated with dreams, there might be a lot of dream - related themes, like exploring the dream world together or using dreams as a means of communication.
I'm sorry, but I don't have specific 'ash and cresselia lemon fanfiction' to recommend directly. You could try searching on fanfiction - specific websites like FanFiction.net or Archive of Our Own. They usually have a large collection of Pokémon - related fanfictions which might include stories about Ash and Cresselia.
First, do your research on their characters. Know their abilities, their roles in the Pokémon world, and any existing lore about them. Then, come up with an interesting plot. It could be a story about them having to work together to stop an evil force, or a more personal story about how they help each other grow. Make sure to give them distinct voices. Darkrai might be more brooding and mysterious, while Cresselia could be more gentle and wise. Also, use vivid descriptions to bring their world to life.
For Darkrai, you could develop his character by showing his internal struggle with his dark nature. Maybe he has moments where he tries to resist his natural inclination towards causing nightmares in the presence of Cresselia. For Cresselia, her development could be shown through her learning to be more understanding of Darkrai's nature rather than just seeing him as a source of chaos.
One plot idea could be that Darkrai and Cresselia are forced to work together to save their shared dream realm from a new and powerful dark force. Their initial animosity due to their opposing natures gradually turns into respect and then something more. Another idea is that a spell goes wrong and they swap powers for a while, leading to humorous and also some deeply emotional moments as they try to understand each other's roles better.
Friendship or love is also a common theme. Many 'cresselia x darkrai fanfic' explore how they develop feelings for each other. It could start as a simple friendship based on mutual respect and understanding of their powers, and then grow into something deeper. For example, in some fanfics, they protect each other from threats, which strengthens their bond and leads to a romantic relationship over time.