1. T.J. Detweiler, voiced by Andrew Lawrence
Other places you may have heard his voice: Bean, Jack Frost, United States of Tara.
2. Vince, voiced by Rickey D'Shon Collins
Other places you may have heard his voice: Danny Phantom, Happy Feet, Star Trek: The Next Generation.
4. Mikey, voiced by Jason Davis
Other places you may have heard his voice: Rush Hour, The Millionaire Matchmaker, Celebrity Rehab With Dr. Drew.
5. Gretchen, voiced by Ashley Johnson
Other places you may have heard her voice: Growing Pains, What Women Want, Ben 10: Alien Force.
6. Gus, voiced by Courtland Mead
Other places you may have heard his voice: Lloyd in Space, A Bug's Life, Babe.
7. Miss Finster, voiced by April Winchell
Other places you may have heard her voice: Phineas and Ferb, Kim Possible, The Legend of Tarzan.
8. Principal Prickly, voiced by Dabney Coleman
Other places you may have heard his voice: Tootsie, WarGames, Boardwalk Empire.
9. Miss Grotkey, voiced by Allyce Beasley
Other places you may have heard her voice: Playhouse Disney, Moonlighting, Legally Blonde.