Tara Strong
Ben Tennyson (voice)
Paul Eiding
Grandpa Max (voice)
Dee Bradley Baker
Stinkfly / Wildmutt (voice)
Steve Blum
Ghostfreak / Heatblast / Vilgax (voice)
Richard McGonagle
Four Arms (voice)
Jim Ward
Diamondhead / Wildvine / XLR8 (voice)
Fred Tatasciore
Cannonbolt (voice)
Richard Steven Horvitz
Grey Matter (voice)
Khary Payton
Hex (voice)
Richard Doyle
Enoch (voice)
Dwight Schultz
Dr. Animo (voice)
Charlie Schlatter
Kevin Levin (voice)
Jennifer Hale
Joey (Rojo) (voice)
Kari Wahlgren
Charmcaster (voice)
Vanessa Marshall
Diamond Head Gwen / Four Arms Gwen (voice)
Tom Kane
Ultimos (voice)
Kim Mai Guest
Elsgood / Grandkid / Kid #1 (voice)
Kath Soucie
Edwin (voice)
Cree Summer
Frightwig (voice)
Jeff Doucette
Thumbskull (voice)
Billy West
Kraab (voice)
Dave Fennoy
Radio Newscaster / Doctor (voice)
Nancy Linari
Automated Voice (voice)
Adam Wylie
Bullie #2 (voice)
Grey DeLisle
Xylene (voice)
Dave Wittenberg
Upchuck (voice)
Michael Dorn
Vicktor (voice)
Robert Patrick
Phil (voice)
Michael Reisz
Kevin Levin (voice)
Nolan North
Teen Attendant / Henchman (voice)
Rosalind Chao
Councilwoman Liang (voice)
Miriam Flynn
Aunt Vera (voice)
John Kassir
Zombozo (voice)
Larry Cedar
Howell (voice)
Nicholas Guest
Clancy (voice)
Robin Atkin Downes
Jonah (voice)
Walker Edmiston
Marty (voice)
Mikey Kelley
Gang #2 / Attendant / Helicopter Pilot (voice)
Robert Picardo
Leader Alien (voice)
James C. Mathis III
Enforcer Alien (voice)
