Wikia supports many wikis for specific movies. But your search feature does not work properly, so a desired wiki cannot be found by searching! The reason is that your software searches for the logical OR of the given phrase, not the exact phrase and not the AND of the phrase. For example, searching for a wiki on the movie Real Genius fails because there are thousands of wikis returned, the inclusive OR of those containing the word "real" and those that contain the word "genius". These returned results are presented in pages, so the visitor cannot even do an ordinary string search to find the phrase.
As a workaround, I looked under the Entertainment link to find a list of all movie wikis. There is no such list! One only finds very short lists of popular movies.
Wikia would be much more useful to the general public if these flaws were fixed.