Board Thread:Support Requests - Getting Technical/@comment-1807002-20150917195905/@comment-168424-20150917224133

You can't. However, you can tell your users that there is a link at the bottom of every page (Full site) to show the non-mobile view and they should try it.

Wikia is aware of many of the problems with mobile and they are working on it. I got the hint that there were technical issues preventing more straightforward methods that admins might use to control the mobile look, but they were cagey on the specifics.

What you should start with is complaining at Special:Contact/feedback, but try to give a list of specific mobile problems and how you would prioritize which should be fixed first.

Your feedback is important to Wikia, but they still have their own agendas and not everything that seems easy to do always is.