Complex sentence: Rollbar first appeared in the 1987 range as part of the Autobot Throttlebot team, similar to the Decepticon Battlechargers in which they were pulled back and then set loose along the floor or other flat surface--minus the auto-transformation.
Split into simpler sentences: Rollbar first appeared in the 1987 range as part of the Autobot Throttlebot team. The Throttlebots were similar to the Battlechargers in which they were pulled back and then set loose along the floor or other flat surface--minus the auto-transformation.