Challenge of the Gobots: Battle Of The Rock Lords (1986)' original theatrical trailer

This animated adventure follows the shape-shifting GoBots as they are recruited by Solitaire, a robot that can transform into a rock, to help out with a power struggle among her kind. Leaving their home planet, Gobotron, the heroic GoBots travel to Solitaire's world to fight Magmar, the ruthless Rock Lord, and his minions. The GoBots must also battle the scheming Renegades, who decide to ally themselves with Magmar, making the GoBots' quest to vanquish evil that much more difficult.