It's another one of those panels where folks who speak for animated characters demonstrate their craft. On the dais are
Gregg Berger (
The Garfield Show),
Laraine Newman (
The Fairly OddParents),
Wally Wingert (
The Avengers),
Bill Farmer (
Goofy),
Alicyn Packard (
The Mr. Men Show),
Michael Bell (
G.I. Joe), and maybe a few others, all put through their paces by voice director
Mark Evanier.
http://www.comic-con.org/wc/wc_search_results.php?strShow=32&strRec=3956