King Cake is a Boss added in v30. He is the King of Cake, if that wasn't obvious enough. He also lives in heaven, and has a variety of attacks. Yeah.
King Cake's throne room appears to be levitating in the sky, held up by clouds. Players spawn in front of a heavenly gold staircase. After walking up it and going through the gates, King Cake himself can be seen. He temporarily sits on a platform which has an ammo table in front of it. To the sides are golden pillars which can be used to kite his minions among other things. To the side is a cage which contains all of the dead players and zombies.
Someone else can fill this in.
King Cake is the first boss in R2D
He appears to reside in the heavens