Yes, there are. There are many fan - created stories that involve Zoro, Robin and Chopper. Some might focus on their adventures together on the Thousand Sunny, like how they work as a team to overcome challenges during a battle with a new enemy. These fanfics can really show different aspects of their relationships that we might not see as much in the original manga or anime.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of One Piece fanfics, and you're likely to find some great ones featuring Zoro, Robin and Chopper there. Just use the search function and type in their names.
Hard to say. It could be associated with a minor character whose background wasn't fully explored. Or perhaps it was just a random prop without a specific owner.
Well, in such a fanfiction, there could be various hints. Maybe Zoro's behavior might be more in line with typical female characteristics described in that specific fictional world, like being more empathetic or having different social interactions compared to the original male - character version. But it really depends on how the author has crafted the story.
I'm not sure if there's a character named Chopper in 'Pulp Fiction'. I might be misinterpreting your question, but I don't recall such a character in the movie.
I'm not sure specifically as there could be many 'Chopper Christmas Stories'. It might be about a character named Chopper during Christmas. Maybe Chopper has some adventures or experiences related to Christmas, like celebrating with friends, going on a Christmas quest, or learning the true meaning of Christmas.