Board Thread:Support Requests - Getting Technical/@comment-26440657-20151013073711/@comment-168424-20151013154226

I would ask Wikia staff via Special:Contact/general. Wikia's chat is custom and they don't give really any documentation about messing with it beyond what some people can deduce to change it's look and some behavior.

You can also try out Monchoman45's Chat Hacks JS in your personal JS. I'm not sure it works well still and doesn't give you exactly what you want, but worth a try. See this blog for how to use them: Chat hacks - how to enable them.