Moonrock is the archetype of "space cadet". Laid-back, mellow, and completely lacking in ambition, his primary goals seem to revolve around philosophy, and finding the Autobots' "place in the universe". (Literally and figuratively.)
- Astro Squad (Micromaster Combiner Squad, 1990)
- Moonrock transforms into a red wheeled truck that is intended to be the front half of a missile transport that he forms with his combiner partner Missile Master. As a Micromaster Combiner he can of course connect to any other Micromaster Combiner or Micromaster Combiner Transport to form new vehicles. He was only available in a six-pack with his squadmates Missile Master, Barrage, Blast Master, Heave and Phaser.