Board Thread:Support Requests - Designing Your Wiki/@comment-24460012-20200305165550/@comment-9605025-20200305174904

You don't "get rid" of the Monaco skin; FANDOM has already done that. There are now only two skins, the desktop one (a.k.a. Oasis) and the mobile one (a.k.a. Mercury or Wikiamobile). Customization to any skin that is not Oasis is ignored. This means you cannot customize the mobile appearance.