Monster High is an American multimedia-supported fashion doll franchise created by toy designer Garrett Sander and launched by Mattel in 2010. Aimed at children aged 7 to 14, the franchise features characters inspired by monster movies, sci-fi horror, thriller fiction, folklore, myths and popular culture, centering around the adventures of the teenage children of monsters and other mythical creatures attending a high school of the same name. Though the fashion dolls were the main focus of the franchise, a 2D-animated web series and 15 animated TV specials/films were released to accompany them, as well as video games, a series of young adult novels written by Lisi Harrison and other forms of merchandise. The franchise quickly became very popular among children and was extremely successful in terms of earnings for Mattel; it was worth $1 billion in its 3rd year of existence with more than $500 million in sales annually, and was the second best-selling doll brand in North America. Two spin-off toy lines were launched as companions to Monster High: Ever After High in July 2013 based on fairy tales and fables and Enchantimals in 2017 featuring human-animal hybrids. However, sales declined in 2016, prompting Mattel to reboot the franchise with a revamped aesthetic and a new fictional universe. The reboot was a commercial failure, eventually leading to the discontinuation of the franchise in 2018. Monster High relaunched a second time in 2020 with the release of new dolls representing horror/goth film cults, culminating with the 2021 announcement of an animated TV series and a live-action musical film, both produced by Mattel Television and premiered on Nickelodeon in October 2022. Premise In the fictional American town of New Salem, the teenage children of famous monsters (and other mythical creatures) attend a high school called Monster High. The school is renowned for allowing all species of monsters to enroll in it: this is in contrast with other schools that exist in the franchise's fantasy world, which are reserved for one type of monster only (for example, a vampire-exclusive school). The characters' stories were told through the TV series, web series, films, the official website, as well as through diaries (booklets) included with the dolls. Since the franchise's beginnings in the late 2000s and early 2010s, Monster High has valued diversity among its characters and their visual appearance, personalities, abilities, and cultural backgrounds. Characters Monster High features a variety of fictional characters,