Bowser (voice)

Aspartamay

Kevin Wilkins

Barry Judd

Bowser (voice)

Self

JB

Zeke (voice)

Po (voice)

Miles

Dewey Finn

Po (voice)

Po (voice)

Po (voice)

Self

Carl Denham

Po (voice)

Wolfman Jack

Jeff Portnoy

Nacho

Roger Davis

Billy Glenn Norris

Self

Self

Stine / Slappy / Invisible Boy (voice)

Steve

Georgie

Hal Larson

R.L. Stine (uncredited)

Lance Brumder

Rick

Broadcast Technician

Doug McCallister

J.D. McNugent

Claptrap (voice)

Lemuel Gulliver

Tenacious D