Billy West does the voices of Elmer Fudd and Peter Lorre/Mad Scientist in Loony Tunes: Back in Action. Great Movie, good voices.
Now that the on-topic part is out of the way :), Lets play "Name That Monster". The scene in Area 52, I recognized most of the monsters, but I could only place a couple of them with actual movie titles. Lets see how many we can get; First Monster: ? Marvin the Martin: Duh. Daleks: Dr. Who. Did WB do the Doctor Who movie way back when? Plant Creature: Little Shop of Horrors? Gorilla with Space Helmet: I don't remember the movie name, but it was on Mystery Science Theater 3000 Brain/Lobster Monster: This Island Earth Black & White guy holding the pod: Invasion of the Body Snatchers Robbie the Robot: Forbidden Planet (those were some of his first lines from the movie) Brain w/Antennae: I've seen it in a bad movie, but don't remember. Guy with the glass helmet(popcorn dude): no idea