• Chris Sanders as Stitch, the main protagonist of the film, who dreams of being a video game warrior.
  • Ron Allen as BJ, the deutergonist of the film, a blue transforming race car robot with a frog-like face and Stitch's best friend.
  • Neil Patrick Harris as Hermit the Gator, the secondary deutergonist of the film, a green alligator, and Stitch's second friend.
  • Jessica Chastain as Princess Angel, a warrior princess who becomes Stitch's love interest.
  • Bruce Campbell as King Mechanic, the corrupt ruler of Steel Rush who flirts with Princess Angel.
  • Adam Carolla and Eric Schussler as Genetic and Metal, King Mechanic's robot guards.
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