Challenge of the GoBots (also known as simply Gobots) is an American animated series produced by Hanna-Barbera Productions, based on the GoBots toy line released by Tonka. Most of the toys were imported from the Japanese Machine Robo toy line . The GoBots originally debuted in animated form as a five-part miniseries, which aired in syndication from October 29 to November 2, 1984. A regular series followed the next year, premiering on September 16, 1985. The series was later rerun on the USA Cartoon Express.