Machine Robo: Revenge of Cronos (マシンロボ クロノスの大逆襲, Mashin Robo: Chronos no Dai Gyakushū), known in France as La Revanche des GoBots (Revenge of the GoBots), is a Japanese anime television series produced by Ashi Productions. It ran on TV Tokyo from July 3, 1986, through May 28, 1987.

A large portion of the Machine Robo toy line was exported and sold by Tonka in America as GoBots and Rock Lords. Central Park Media released 15 English-subtitled episodes of the series on three DVDs in 2003; these remained the only official English releases until 2022, when Discotek Media released the complete series and its associated OVAs on one SD Blu-ray set.

The story takes place on the mechanical world of Cronos. A band of villains called the Gyandlar have come to the planet in search of the mythical energy known as the Hyribead.

Recolors of Bandai's "Zenmai Kahen Winch Robo" line. Other recolors were released as "Secret Riders" GoBots in the U.S.

Based on the molds released in the Tonka "Rock Lords" toy line in the U.S. and Europe.

Recolors of these toys were released in the "Rock Lords" toy line in the U.S. and Europe.

These characters had highly articulated and detailed pull-back toys that are exclusive to Japan. They were not used in the Gobots series.

Throughout the first half of the series Gadess uses various natives of Cronos to lead his forces.