• 
  Chris Brown

  scenarist

• 
  Michael Clarke Duncan

  Massive (4 episodes, 2005-2007)
• 
  Vivica A. Fox

  Black Velvet (1 episode, 2005)
• 
  Charlie Schlatter

  Ace Bunny
• 
  Jason Marsden

  Danger Duck
• 
  Tim Curry

  Ringmaster (1 episode, 2005)
• 
  Bill Farmer

  Mr. Leghorn (1 episode, 2005)
• 
  Cree Summer

  Little Kid (1 episode, 2005)

• 
  Khary Payton

  General Deuce (3 episodes, 2006-2007)
• 
  Mark Hamill

  Adolpho, Ship Captain (1 episode, 2006)
• 
  Dee Bradley Baker

  Otto the Odd  (2 episodes, 2005-2007)
• 
  Kevin Michael Richardson

  Slam Tasmanian  (26 episodes, 2005-2007)
• 
  Joe Alaskey

  Sylth Vester  (5 episodes, 2006-2007)
• 
  David Faustino

  Arthur  (1 episode, 2006)
• 
  Phil Morris

  Additional Voices (2 episodes, 2006)

• 
  Phil LaMarr

  Drake Sypher (3 episodes, 2005-2006)
• 
  Tom Kenny

  Gunnar the Conqueror (1 episode, 2005)
• 
  Kaley Cuoco

  Paula Hayes  (3 episodes, 2005-2006)
• 
  Maurice LaMarche

  Ice Cream Vendor  (2 episodes, 2006)
• 
  Billy West

  Electro J. Fudd  (2 episodes, 2006-2007)
• 
  Jessica DiCicco

  Lexi Bunny (26 episodes, 2005-2007)
• 
  Steve Blum

  Fuz-z (1 episode, 2005)
• 
  Florence Henderson

  Mallory Casey  (3 episodes, 2006)
• 
  Carlos Alazraqui

  Voci adiţionale (episoade necunoscute)
• 
  Charles Adler

  Optimatus  (5 episodes, 2005-2007)
• 
  Dan Castellaneta

  College Professor (1 episode, 2005)
• 
  Candi Milo

  Zadavia  (26 episodes, 2005-2007)
• 
  Daran Norris

  Alien Dad  (1 episode, 2006)
• 
  Grey Griffin

  Apocazon (1 episode, 2007)
• 
  James Arnold Taylor

  Bugsy the Bug  (1 episode, 2007)
• 
  Mikey Kelley

  Rip Runner (1 episode, 2006)
• 
  Rob Paulsen

  Rev Runner