Scooby-Doo 2: Monsters Unleashed is a 2004 film, and sequel to Scooby-Doo (2002) based on the Hanna-Barbera series classic, Scooby-Doo. It was directed by Raja Gosnell, who also directed the first film, and was written by James Gunn, who also wrote Scooby Doo. It was released on March 26, 2004.