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Brimstone is an evil Rock Lord from the planet Quartex. He is Magmar's second in command and possessor of a scheming intellect.


Challenge of the GoBots cartoon[edit]

Voice actor: Dick Gautier
BOTR Brimstone2.jpg

Brimstone worked with Magmar to capture rival Rock Lords, take their power sceptres and add them to the Power Stone in order to create the Ultra Scepter. He and Tombstone failed to detect Granite spying on them inside Stonehead, however. Along with the rest of Magmar's band he was trapped by Boulder's troops in a valley until the Renegades arrived and turned the tide of the battle, and then participated in their subsequent alliance until the Renegades turned on them and the Ultra Sceptre was destroyed. Brimstone survived to fight under Magmar another day, however.Battle of the Rock Lords

Rock Lords packaging[edit]

Brimstone had discovered a Good Rock Lords hideout, to which he led Magma and Sticks'n Stones. Changing from his rock mode, he prepared to show Boulder who's boss. Brimstone mini-comic

GoBots Magazine[edit]


Magmar's band teamed up with the Renegades a second time on Quartex. The Renegades pretended to steal a stone statue and were driven off by the combined troops of Boulder and Leader-1; however, 'twas all a ruse. The good guys took the statue inside the Command Center for safekeeping, only to crack open in the middle of the night - revealing Magmar, Brimstone and Slimestone. Scooter and Nuggit had spent all night Greeking out and sat up watching the statue, and were able to raise the alarm shortly after Magmar let the Renegades inside the Guardian ship. A fight broke out, with Brimstone fighting Granite, before the two sidekicks tricked the Renegades and Evil Rock Lords to walk out of the ship into space, leaving Brimstone to be carried to safety by Crasher. Conquest of the Command Center! Later his troops had Boulder, Marbles, Granite, Crackpot and Pulver-Eyes trapped on the edge of a cliff that they couldn't just roll off as rocks. Nuggit then arrived with the Rockasaurs, providing a distraction for Boulder and chums to turn into rocks and knock them over. Update from Quartex


Rock Lords mini-comics[edit]

Brimstone gathered the Evil Rock Lords when Magmar discovered another secret of Stonehead - the Cryon Ray. They then set up an ambush for Boulder's Good Rock Lords, freezing them in rock mode and taking them to their base. However, Nuggit had escaped and was able to free his comrades. Boulder then shot everyone with his sword sic and the good guys escaped, leaving Magmar to swear revenge. Powerful Living Rocks Face a Deadly New Peril

Machine Men mini-comics[edit]

After the Australian Army dropped a nuclear bomb on the Enemy Machine Men during a pitched battle on Earth the explosion awakened the Rock Lords, with Pulvereyes the first to break through the planet's surface, punching the ground with enough force to floor Leader-1 and Spay-C.Challenge of the Machine Men



Rock Lords[edit]

Rock Lords, Series 2[edit]

  • Brimstone (1986)
    • Evil Rock Warrior/Second-in-Command
    • Rock Type: "Brimstone: a foul-smelling combination of sulfur and rock."
    • Accessories: The Torcher
Released as part of the second series of Rock Lords, Brimstone converts from robot to rock in six steps. Like many Rock Lords figures Brimstone has strong articulation, with good movement at the shoulders, elbows, hips and knees and is very durable. His mouth can even open a little. Like all of the 1986 Rock Lords, his packaging features a Collector Card biography, a four-frame mini-comic printed on the card, paper instructions and a copy of the "Powerful Living Rocks Face a Deadly New Peril" mini-comic.

Robo Machine[edit]

Rock Lords[edit]

  • Brimstone (1986)
    • Evil Rock Warrior/Second-in-Command
    • Rock Type: "Brimstone: a foul-smelling combination of sulfur and rock."
    • Accessories: The Torcher

In Europe, Rock Lords was a subline of Robo Machine. Brimstone was issued by Bandai in 1986 with no significant changes.


  • Brimstone's working name was Pulvereyes.
  • At an early stage his toy used a completely different purple colour scheme and a considerably different sculpt, with a more conventional head, taller shoulders and a different featureless "mouth" in his chest.