It was this movie like a cowboy, western type movie. From the top of my head I think it was animated a little like Toy Story. There was this scene where the black knight antagonist was behind the shower curtain hiding, and also this classic cowboy standoff with the protagonist dodging all the black knights bullets. There was I think also a rocket at the end of the movie. If you know please tell me, I’ve been struggling for years trying to find it.
(Edit: there was also a scene in an underground tunnel, and characters locked in tiny cages, I think now that I think about it, there couldve also been a shrinking of some characters, and thats why they were in those tiny cages (not sure tho))