The American fashion doll franchise Monster High, created by Mattel, was adapted into an animated web series released on YouTube. The series follows a group of teenage characters who are the children of famous monsters in media and film as they attend high school. Along with its feature-length direct-to-video films, the animated series serves as a platform to launch new doll characters. The web series finished its first run in 2015 with Volume 6, and began a reboot run with the Adventures of the Ghoul Squad series. 186 webisodes of Monster High were produced.