A batch of monsters are shrunken to pocket size by a freak accident. A horror author's daughter finds the good monsters, and together, they battle the puny bad monsters, who have learned to grow temporarily when they hear a movie monster actress's scream.
| Actor | Role |
|---|---|
 Marvin KaplanVampire (voice) | Vampire (voice) |
 Rob PaulsenJerk at Drive-In (voice) | Jerk at Drive-In (voice) |
 Stuart K. RobinsonWolf Man (voice) | Wolf Man (voice) |
 Dina ShermanCarrie Raven (voice) | Carrie Raven (voice) |
 B.J. WardMedusa / Raye Fay (voice) | Medusa / Raye Fay (voice) |
 Frank WelkerBig Ed / Swamp Beast / Projectionist (voice) | Big Ed / Swamp Beast / Projectionist (voice) |
 Paxton WhiteheadDr. Henry Davenport, the Invisible Man (voice) | Dr. Henry Davenport, the Invisible Man (voice) |
 April WinchellHelga (voice) | Helga (voice) |