Grim Adventures Of Billy And Mandy (the) Easter Egg - Beastly

If you have read the Bible a little bit, you would understand the number of the beast. It is 666, an evil number to some, target of superstition. This is a dark humored show, so I can understand why they would put this in. On the episode with the skull who can grant 9 wishes,(with some downside) the eeg is located. At the point where his number changes from 7 to 6, both of his eyes have the number six. 666, the number of the beast.