He looks like a ginormous version of the Control Brain seen in The Frycook What Came from All That Space.
You're not supposed to know about M@ST3R1-3-6. You will not be told any more information about him. And now that you've been told about him, your memory of ever being told about M@ST3R1-3-6 will be erased. He's top secret. Only the Control Brains and Emperor Vis are to know about him.