There are fanfics that focus on the relationship between Lilo and Stitch in different scenarios. For example, a story where they get separated due to some intergalactic event and have to find their way back to each other. Stitch might meet some old 'cousins' of his during this time who either help or hinder his journey back to Lilo.
One idea could be about Stitch learning new Hawaiian traditions with Lilo and her family. For example, they could be preparing for a big luau together, and Stitch has to master a particular dance or cooking technique.
One popular theme could be the adventures they have together. Stitch's unique abilities and Lilo's kind heart might lead them into various situations, like exploring new parts of their island.
One popular theme could be exploring Stitch's more menacing side that was perhaps held back in the original. For example, how his destructive tendencies might be unleashed in a darker version of the story. Another could be the idea of Lilo being in more dangerous situations due to her association with Stitch, like being hunted by those who fear Stitch's power. Also, the concept of an alternate reality where the bond between Lilo and Stitch is strained and they turn against each other in some way.
Friendship is a very common theme. Lilo and Stitch have a special bond, and fanfics often explore how they support each other through different situations. Another theme is family. Since Lilo has her own family situation and Stitch becomes part of that family, it's often written about. For example, how Stitch adjusts to family life and the family's reaction to him.
Friendship is a very common theme. The original characters often form deep bonds with Lilo and Stitch, just like how Lilo and Stitch are friends. For example, in many fanfics, the OC might help Stitch when he gets into trouble with Jumba or other aliens.
There's also a fanfiction where Lilo and Stitch time - travel. They end up in the future and have to deal with advanced technology while still being their unique selves. It's really interesting as it combines the charm of the original characters with a futuristic setting. In this story, Stitch's adaptability is put to the test in a whole new way.
There are fanfics where they go on adventures together and during those adventures, their relationship deepens into a loving one. These often include elements of Hawaiian culture as it was in the original movie, which adds a lot of charm to the love story being told.
One popular theme is the further adventures of Lilo and Stitch. Writers often come up with new threats or challenges for them to face on Kauai. Another theme is the relationship between Stitch and the other 'cousins'. Some fanfictions explore how they interact and support each other. Also, the cultural aspect of Lilo's Hawaiian heritage is often explored, like her participation in local festivals or the passing down of family traditions.
The unique relationship between Lilo and Stitch in the original work is a big factor. Transforming it into a love story in fanfics gives it a new and interesting dimension.
The character development that can occur in a crossover is great. Lilo might learn new things about herself and her relationship with Stitch when they are in a completely new environment. For instance, if they cross over to a world full of magical creatures, Lilo could discover new ways to be brave and kind.