On Cartoon Network's show Foster's Home for Imaginary Friends - Episode Read 'Em and Weep - they've created an imaginary friend named "Morriss-E." He speaks in "Morriss-code." The Morriss-E character appears 12 minutes into the show. Here's the link I found where you can view the episode:
http://www.truveo.com/Foster’s-home-for-Imaginary-Friends-Read-Em-and/id/1083679092
http://www.truveo.com/Foster’s-home-for-Imaginary-Friends-Read-Em-and/id/1083679092