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 Goblin King Shaggy are allowed to keep theirs as they have proven their courage. As morning comes, Fred, Daphne and Velma forget what transpired (due to the effects of the memory-erasing spell) as Shaggy and Scooby-Doo come to pick them up. As the carnival packs up, Scooby uses an unpacked mirror one last time to spook the gang as the film ends. Some monsters from "Scooby-Doo, Where Are You!", "The New Scooby-Doo Movies", "The Scooby-Doo Show", "Scooby-Doo and Scrappy-Doo", "What's New, Scooby-Doo?" and "Scooby-Doo! and the Legend of the Vampire" are sighted in this movie: Scooby-Doo! and the Goblin King Scooby-Doo and