Lloyd Nebulon / Android Lloyd (40 episodes, 2001-2004)
Kurt (40 episodes, 2001-2004)
Douglas McNoggin (40 episodes, 2001-2004)
Eddie Horton (40 episodes, 2001-2004)
Nora Nebulon / Nora (35 episodes, 2001-2004)
Mrs. Bolt (28 episodes, 2001-2004)
Francine Nebulon (25 episodes, 2001-2004)
Station (24 episodes, 2001-2004)
Megan Uno (22 episodes, 2001-2004)
Brittany Boviak (18 episodes, 2001-2004)
Officer Frank Horton (13 episodes, 2001-2004)
Lord Voon / Mr. Stinko (12 episodes, 2001-2003)
Boomer (11 episodes, 2001-2003)
Nice Cindy (10 episodes, 2001-2003)
Dunkirque (10 episodes, 2001-2002)
Rodney (8 episodes, 2001-2004)
(8 episodes, 2001-2003)
Mendel (7 episodes, 2001-2004)
(7 episodes, 2001-2004)
(7 episodes, 2001-2003)
Larry (7 episodes, 2001-2003)
Mean Cindy (6 episodes, 2001-2002)
Grandpa Leo (6 episodes, 2001-2002)
(6 episodes, 2001-2002)
(6 episodes, 2002-2003)
Bitsy (5 episodes, 2001-2003)
Additional Voices / Kids (5 episodes, 2001-2002)
(5 episodes, 2002-2004)
Violet (5 episodes, 2002)
(4 episodes, 2001-2004)
(4 episodes, 2002-2004)
Zoit (3 episodes, 2001-2003)
(3 episodes, 2001-2003)
(3 episodes, 2001-2002)
(3 episodes, 2002-2004)
(3 episodes, 2002-2003)
(2 episodes, 2001-2003)
(2 episodes, 2001-2002)
Douglas' Father (2 episodes, 2001-2002)
Teacher Queen (2 episodes, 2001)
Larvel / Usher (2 episodes, 2001)
(2 episodes, 2001)
Additional Voices (2 episodes, 2001)
Debater 2 (2 episodes, 2002-2003)
(2 episodes, 2002-2003)
(2 episodes, 2002)
Eileen / Mylaar (2 episodes, 2002)
Black Hole Pizza Delivery (2 episodes, 2003)
(2 episodes, 2003)
Mrs. Noisisco (1 episode, 2001)
Mrs. Slugblath (1 episode, 2001)
Dr. Yabmom (1 episode, 2001)
(1 episode, 2001)
Brock Rockman (1 episode, 2001)
Dr. Werner Von Brain (1 episode, 2001)
Charmaine (1 episode, 2001)
Ranger Wormy (1 episode, 2001)
(1 episode, 2002)
Midge (1 episode, 2002)
Debater 1 (1 episode, 2002)
(1 episode, 2003)
(1 episode, 2004)