Actually from the way he was talking to GB, well, lord knows talking to himself like a lunatic is such a freaky deaky GB thing to do, so it's probably Goldenboko. But I think rubah guessed that first.
I'm quite the loony. Thats why you like me so much
EDIT: If I'm posting here I may as well guess. Psychotic; Because you know he's going to become a phantom eventually xD