Blake Lewis as 'Thump' on Generator Rex

Blake Lewis voiced a three-headed monster on the Cartoon Network.

From Blake Lewis Army:

Last year on February 22nd,2010 Blake was at Cartoon Network's recording studio to do his first voice over for the show 'Generator Rex' his character is a three headed monster named 'Thump' who argues with himself and beat boxes.

The episode aired on February 18th,2011 on Cartoon Network. The episode is called 'Lost Weekend'

Part I:

Part II: