Some dedicated anime streaming websites might offer dubbed ghost stories. For example, Crunchyroll or Funimation. But make sure they have the rights to stream in your region.
You could search on dedicated anime or horror streaming websites. But be careful to choose legal and reliable ones. Another option is to check if your cable or satellite TV provider has a channel that shows dubbed ghost stories in their programming lineup.
You could search on dedicated drama websites that focus on providing dubbed shows. Another option is to check with local cable TV providers that offer international drama channels. They might be airing it.
It might reimagine the One Piece world by introducing elements from other universes. For example, new types of Devil Fruits inspired by powers from other worlds. Maybe a Devil Fruit that gives the power of telekinesis like some characters in a sci - fi universe have.
One option could be to search on specific websites dedicated to Turkish dramas. Sometimes, these sites have dubbed episodes available. Another possibility is to look on YouTube, as some users might upload such content. But be careful to ensure it's from a legal and reliable source.
It can expand on existing characters. For example, by revealing new aspects of their pasts through the watch memories. This could give more depth to characters like Sanji.
In the world of One Piece, there's no indication that the characters themselves watch fanfiction. Fanfiction is a creation of the fans in the real world, and the in - universe characters are too busy with their own adventures, like Luffy chasing after the One Piece, Zoro training to be the world's greatest swordsman, and Nami navigating the seas. They don't have access to or knowledge of the fan - made stories about them.