Features in this category lack of any UI, and thus are not dependent of any skin. They're usually disabled by user preference option, editing a MediaWiki: page or requesting it using Special Contact.
“The Wikia Welcome Bot is a bot that creates their userpage and puts a welcome message in the...Wikia Welcome Bot
“The My Home redirect is a special kind of redirect. It causes the url of the site without any...My Home redirect
“Wikia made links to nonexistant categories as normal links instead of having the normal red link...Category redlinks not red
“Article comments is a feature that allows users to leave comments at the foot of an article...Article comments