Board Thread:Support Requests - Community Management/@comment-25867149-20160310185034/@comment-1251315-20160310185209

Wikia do not divulge IP address information to any user. CheckUser requests are only done if you are having problems with users vote fixing a consensus, not just for curiosity purposes.

If you are a bureaucrat on the wiki, simply ignore the request and reject it, as it's usually against most wiki's policy to promote someone to sysop who hasn't got any contribution in the wiki.