The term "Super Effective!" appears a few times in the game, referencing Double Fine's comic series.
Kyle Gass appears, along with the suggestions that he and Jack Black's Eddie "team up" - of course a reference to their spoof metal band Tenacious D.
I might be mistaken, but I think that family of bats is meant to be the Osborne family, with Ozzy voicing (and looking like) the Dad Bat.
Last edited by The Tingler; 10-20-2009 at 02:14 PM.