User blog:Sepublic22/Who is Zoltar?!

So, I keep seeing this Zoltar guy being listed as a Venomari, but I've literally never even heard of him before. I've checked just about every Ninjago supplemental material, and Zoltar's page doesn't even list ANYTHING, no appearances, nothing! Point in case, is Zoltar an ACTUAL character, and where is he from?!