Board Thread:Support Requests - Getting Technical/@comment-24253265-20131215091427/@comment-11733175-20131215110324

Useskin can take the following arguments: Uncyclopedia is more or less a vector clone as far as I know. lostbook and wowwiki are customised monobook skins. As you figured out wikia and oasis are interchangeable, the default skin is known by both names.
 * Oasis
 * Wikia (same as oasis)
 * Monobook
 * Uncyclopedia (see w:c:uncyc)
 * Lostbook (I forget where this one is used)
 * Wowwiki (see w:c:wow)
 * Wikiamobile

In monobook and vector the sidebar is created from MediaWiki:Sidebar, and can be customised locally. You will always see some corporate wikia links at the very bottom which I presume exist from a time before oasis (and maybe monaco). You can also find an adverts container in monobook, although it hasn't been used for a long time.

Hope this helps :)