Well, you can start by having the characters cross over. For instance, Donald and Goofy could show up on Tatooine. They would be really out of place, which would create some humorous situations as they try to figure out the strange new world. Then, they could meet Luke Skywalker and start an adventure together.
There are fanfictions that might focus on the characters from both universes interacting in unexpected ways. Like, Riku meeting Luke Skywalker and learning about the Force from him while also teaching Luke about the power of the heart. This kind of crossover can lead to some really cool character development and plot twists.
The most interesting part is the crossover of characters. Seeing Sora interact with Luke Skywalker, for example, is really cool. They come from different universes with different powers and moral codes, but in the fanfiction, they can learn from each other.
One good example could be a fanfic where the characters from Kingdom Hearts 3 end up in the Star Wars universe. They might interact with Jedi or Sith, like Sora trying to understand the Force. Another example could be a story where the Keyblade wielders team up with the Rebel Alliance to fight against the Galactic Empire. It could add an interesting dynamic to the Star Wars lore with the unique abilities of the Kingdom Hearts characters.
The settings can also be combined. For example, a Star Wars planet like Tatooine could be a location in a Kingdom Hearts - Star Wars fanfic. The desolate landscape of Tatooine would provide a contrast to the more colorful and magical worlds in Kingdom Hearts. Characters from both universes would have to adapt to this new environment, leading to exciting adventures.
A common trope is the 'lost in a new world' trope. For instance, a Star Wars character could end up in the Kingdom Hearts universe and be completely bewildered by the different rules and magic there. Or vice versa, a Kingdom Hearts character in the Star Wars galaxy would be shocked by the technology and different cultures.
Well, perhaps there's a plot twist where the villains and heroes are forced to team up in the Keyblade Wars. Due to some greater threat that emerges during the war, like an ancient evil that was sealed away long ago and is now breaking free because of all the chaos of the war. This would completely change the dynamics between the characters.
Sure. One popular Kingdom Hearts Star Wars fanfiction is 'A Galaxy Far, Far Away in Kingdom Hearts' which combines the unique worlds and characters of both franchises in an exciting adventure. The characters from Star Wars interact with those from Kingdom Hearts in a way that stays true to their original personalities.
One possible plot could be that Sora and his friends find themselves in the Star Wars universe. They team up with Luke Skywalker to fight against the Heartless that have somehow invaded the galaxy. Sora's Keyblade could be a unique weapon in this new setting, and they could learn about the Force while sharing their own knowledge of the Heart.
You can start by looking on fanfiction websites like Archive of Our Own or FanFiction.net. Use the search terms 'Star Wars Kingdom Hearts' to narrow down the results. Check the ratings and reviews of the fanfictions to see which ones are popular and well - liked.