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.
Alvin Seville / Simon Seville / Dave Seville (voice)
Dee Bradley Baker
Tour Guide (voice)
Michael Bell
Dr. Frankenstein (voice)
Mary Kay Bergman
Mother (voice)
Janice Karman
Theodore Seville (voice)
Jim Meskimen
Mr. Yesman (voice)
Kevin Michael Richardson
Bud Wiley (voice)
Frank Welker
The Monster (voice)
