The Chipmunks work in an amusement park attraction. After Alvin drives a crazy tour group, they miss their next performance and are locked in the park after closing time. Little do they know that the real Dr. Frankenstein has been hired in a new attraction called, "Frankenstein's Castle"; figuring that the castle isn't scary enough, the mad scientist recreates the real Monster.
Ross Bagdasarian, Jr.
Dee Bradley Baker
Michael Bell
Mary Kay Bergman
Janice Karman
Jim Meskimen
Kevin Michael Richardson
Frank Welker