Challenge of the Go Bots dealt with two opposing forces of transforming robots from the planet Gobotron: the heroic Guardians and the evil Renegades. The Guardians were led by Leader-1; others included Turbo and Scooter. The Renegades were led by Cy-Kill, with Crasher and Cop-Tur among their ranks. Challenge of the GoBots is considered to be a rip-off of Transformers; this is only partially true. The GoBots toyline pre-dates the Transformers toyline (recycling a lot of Machine Robo toys). However, the cartoon was created as a response to the Transformers cartoon.