Machine Robo
The first Machine Robo animated series was "Challenge of the Gobots", which aired in the United States from 1984 to 1985. The second series was ', which aired in Japan from 1986 to 1987. There were some further straight-to-video adventures released from 1988 to 1990 that featured some characters from this anime. The third series was ', which aired in 1987. The fourth and latest animated series was "Machine Robo Rescue", which aired from 2003 to 2004.