Magical girl is a subgenre found in which American animated television series first shown by Disney in 2015?
Magical girl: Magical girls (魔法 少女 , mahō shōjo , also known as mahou shoujo or majokko) is a subgenre of Japanese fantasy anime and manga which feature girls who use magic. Magical girl:  Although the genre has origins in Japan, it has been used as a motif outside Japan in Western works such as "", "Star vs. the Forces of Evil", "Steven Universe", "Winx Club" and "W.I.T.C.H.".
i don't know