The film features the main series cast along with notable guest voices: : Voiced by Richard Steven Horvitz . Mandy & Mandroid : Voiced by Grey DeLisle . Grim : Voiced by Greg Eagles. The Boogeyman : Voiced by Fred Willard . Irwin : Voiced by Vanessa Marshall . Fred Fredburger : Voiced by C.H. Greenblatt . Horror : Voiced by George Segal . Reception and Availability

The story begins with a glimpse into a dystopian future where an older Mandy rules with an iron fist. Back in the present, Grim is stripped of his title and powers by the Underworld Court due to his failure to properly reap a soul because of Billy and Mandy's interference.

His old rival, the Boogeyman , takes his place and reveals a plan to steal , an artifact that can turn its wielder into the scariest being alive. To save Grim and the world, Billy, Mandy, and Irwin must race against Boogeyman's crew of monster pirates to reach the artifact first. Key Characters and Cast

The film received generally positive reviews for its humor and faithful expansion of the show's lore. It premiered in the United States on March 30, 2007. In Romania, it was aired on Cartoon Network under the title Aventurile lui Billy și Mandy cu Bau-Bau . Billy & Mandy's Big Boogey Adventure

(original title: Billy & Mandy's Big Boogey Adventure ) is a 2007 animated television film produced by Cartoon Network Studios . It is the first feature-length movie based on the series The Grim Adventures of Billy & Mandy . Plot Overview