Board Thread:Support Requests - Getting Technical/@comment-20302766-20130205133610/@comment-10688548-20130205200622

Merging wikis is not an automated process at all, you know.

Basically it is up to the users to do 90% of the work: moving relevant content over, negotiating and transferring user rights, and all that. Once that is taken care of, Staff are contacted to, usually, just do two things:
 * 1) delete the inferior wiki
 * 2) redirect inferior.wikia.com to superior.wikia.com.

Fandyllic is correct regarding redirects. See http://castlewolfenstein.wikia.com/wiki/Wolfenstein_3D. It redirects to the same page at wolfenstein.wikia.com, because I had redirects from several URLs set up to my site.