Will Stronghold
Gwen Grayson / Royal Pain
Steve Stronghold / The Commander
Josie Stronghold / Jetstream
Layla Williams
Coach Boomer
Principal Powers
Ron Wilson, Bus Driver
Ethan
Magenta
Little Larry
Zachary "Zach" Braun / Zack Attack
Warren Peace
Penny
Lash
Speed
Carbon Copy Kid
News Anchor
Nurse Spex
Mr. Grayson / Stitches
Mr. Boy
Mr. Medulla
Twin
Evil Twin
Cook
Young Commander
Mr. Timmerman
Mrs. Timmerman
Royal Pain (voice)
Student Sidekick (uncredited)
Penny's Date (uncredited)
Laser-Vision Boy (uncredited)
Funky Prom Boy (uncredited)