Scooby-Doo and the Alien Invaders four Scooby-Doo direct-to-video films to be animated overseas by Japanese animation studio Mook Animation. It was the last film to feature Mary Kay Bergman as the voice of Daphne before her death in November 1999 and the film was dedicated to her memory. The Mystery Machine is driving through a desert in Roswell, New Mexico. A sandstorm comes up and Shaggy Rogers makes a wrong turn onto government property. Seeing a UFO causes Shaggy to lose control of the vehicle and the gang find themselves on the outskirts of a small town. While Scooby-Doo and Shaggy stay with the van,
Scooby-Doo! and the Witch's Ghost features real ghosts instead of traditional crooks in masks, giving the film a darker tone. The film has been adapted into a book. It is the second of the first four Scooby Doo direct-to-video film to be animated overseas by Japanese animation studio Mook Animation. The film marks the first time voice actor and radio-personality Scott Innes voiced Shaggy, as Billy West (who voiced Shaggy in "Scooby-Doo on Zombie Island") needed time for his roles as Philip J. Fry, Professor Farnsworth and Dr. John Zoidberg on "Futurama". After Ben Ravencroft, a famous horror writer of whom Velma Dinkley is a