Board Thread:Off Topic/@comment-25405817-20160511154306/@comment-25405817-20160511154831

One thing to take note of: The way Fanfiction.net classifies X-overs works in that it assumes that your story is simply having characters from the two sources interact with each other. That is a very obtuse and limiting concept.

Like I mentioned, there has been a satire of Star Wars starring the cast of Animaniacs. Though there are other examples of SW satires, Animaniacs did it first. And without having a single character from the movies interact with them (mainly because they were replaced by an Animaniac character; I.e: Luke, Han and Leia became Wakko, Yakko and Dot respectively).

So a C-over fic is not limited to the "cast of X meets the cast of Y" format.