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.
It is highly inappropriate. 'Lilo and Stitch' has a positive image and is loved by many for its innocent and heartwarming story. Fanfiction should be in line with the general spirit of the original work, and sexual content has no place in relation to this particular franchise.
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 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.
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.
The back story of Lilo and Stitch involves Stitch being an illegal genetic experiment created by Jumba Jookiba. He was designed to be a destructive force. Stitch escapes and ends up on Earth in Hawaii where he meets Lilo, a lonely girl. Lilo is dealing with the loss of her parents and is a bit of an outcast. Their meeting sets off a series of events where they form an unlikely bond and Stitch starts to learn about 'ohana, which means family in Hawaiian. Their relationship grows as they face challenges together, like dealing with the alien hunters who are after Stitch.
One great 'Lilo & Stitch' fanfiction is 'Stitch's New Adventure'. It takes the characters on a journey to a new planet where they encounter strange and friendly aliens. The author does a wonderful job of keeping the spirit of the original show, with Stitch getting into all sorts of comical and heart - warming situations.
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.