
Boulder
Brave, wise and quick to anger, Boulder leads the good Rock Lords and has gathered Quartex's last free kingdoms to stand against Magmar.
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Rock Lords were rocks that opened up into robot warriors, a GoBots spin-off that Tonka built from Bandai's Japanese Machine Robo toys. Boulder's Good Rock Lords took on Magmar's Evil Rock Lords in the shops and in the 1986 film, with the gemstone Jewel Lords and the furry, wheeled Rock Narlies joining in. The robots that started it all are on the GoBots page.
Complete checklist of 40 Rock Lords figures across 8 series by Tonka, 1986-1987. Updated 6 November 2026.

Good Rock Lords (1986)

Evil Rock Lords (1986)

Rock Lords: Action Shock Rocks (1986)

Rock Lords: Fossil Lords (1986)

Rock Lords: Jewel Lords (1986-1987)

Rock Lords: Rock Narlies (1986)

Rock Lords: Rockasaurs (1986)

Rock Lords: Vehicles (1986)



The good Rock Lords toys, led by Boulder, with Nuggit, Granite, Crackpot, Marbles and Pulver Eyes in his ranks. Each rock unfolds into a robot hero armed against Magmar's Evil Rock Lords.

Brave, wise and quick to anger, Boulder leads the good Rock Lords and has gathered Quartex's last free kingdoms to stand against Magmar.
1 Accessory

Slightly goofy Crackpot gets teased for his wild ideas, yet they keep saving the day, and his Magnetic Pulse Gun turns bad rocks into heaps.
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Granite is a cheerful gentle giant until a fight starts, and his T-Gun fires shiny bullets that are meant to pierce anything.
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Known in Japan as Maskrock, Marbles is the psychic of the good Rock Lords, able to see what's coming before a fight begins.
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The smallest of the good Rock Lords and proud of his gold finish, Nuggit carries a Tri-Gun that hypnotises, paralyses and then revives.
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Pulver-Eyes likes to snack on rocks, and in battle his Arrestor latches on to enemies so he can reel them in.
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The evil Rock Lords toys, led by Magmar, who was voiced by Telly Savalas in the 1986 film. Tombstone, Stoneheart, Brimstone, Slimestone and two-headed Sticks 'n Stones make up his army against Boulder's Good Rock Lords.
Scheming Brimstone is always ready to take command in Magmar's place, and he charges into battle with The Torcher, a flame-throwing weapon.
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Magmar leads the evil Rock Lords in his bid to rule the planet Quartex, and in the 1986 film he was voiced by Telly Savalas.
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Short, squat Slimestone loves a wallow in boiling oil and fires his Slimegun to coat enemies in smelly goo that won't come off.
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Two heads on one rocky body, Sticks 'n Stones bicker all the time but team up to smash good rocks with the Double Duty Mace.
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The biggest and cruellest of the evil rocks, Stoneheart looks after himself first, and even Magmar thinks twice before crossing him.
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Tombstone lives for battle and can't stand any talk of peace, rushing at the good rocks with his weapon, The Reaper.
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Shock Rocks were Rock Lords with a single action gimmick. Rock Roller revs up and rolls, Rock Shot has a throwing arm and Stone Hook has a hook for a hand, with Stun Stone, Blast Rock and Dragonstone following.


A Shock Rock on Boulder's side, Rock Roller has a friction wheel underneath, so you rev him up and send him rolling across the floor.

Called in by Magmar, Rock Shot is a Shock Rock with a throwing arm that hurls a rock at the good guys.

Magmar's Shock Rock Stone Hook has a powered hook for a hand that reels his victims in.

Four bony rocks, Jaw Bone, Rib Cage, Hip Bone and Tail Bone, that combine into the dinosaur Fossilsaurus. They were sold together as one boxed set, so a complete Fossilsaurus means all four.

Hip Bone makes the hips and legs of the Fossilsaurus combiner, and stands as a monster of its own when the set is split up.

Jaw Bone becomes the head when the four Fossil Lords join up as Fossilsaurus, a set sold boxed together rather than one by one.

Rib Cage forms the chest and arms of Fossilsaurus, the dinosaur the four Fossil Lords build between them.

Tail Bone is the back end of Fossilsaurus, the four-part dinosaur that began life in Japan as Gattai Saurer.
The Jewel Lords were the gem Rock Lords: Solitaire the diamond queen, ruby Flamestone and amber Sunstone. Solitaire was voiced by Margot Kidder in GoBots: Battle of the Rock Lords.
Queen of the Jewel Lords and a diamond in rock form, Solitaire is at the heart of the 1986 film, where Margot Kidder voiced her.
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Called Rubyman in Japan, Flamestone is the ruby Jewel Lord, a hot-blooded fighter on Boulder's side.
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An amber Jewel Lord known in Japan as Amberman, Sunstone is a wild loner with a deep love of nature.
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The Narlies were Tonka's own addition to Rock Lords: fluffy creatures like Narlihog and Narlilion on a hidden wheel that bobs the head and tail as you push. There were two batches of four.

Narlihog is the other good Narlie, a furry hog on a hidden wheel whose head and tail bob as you push him along.

The Rockasaurs were Rock Lords that change into prehistoric monsters, the horned Spike Stone and the flying Terra-Roc. Neither side can count on them.
Spike Stone is a Rockasaur, a rock that turns into a horned dinosaur and sides with neither good nor evil, guarding its patch from both.
Terra-Roc is a winged Rockasaur that unfolds from a rock into a pterodactyl-like beast, a danger to good and evil Rock Lords alike.
Rock Lords vehicles: Magmar's Stone Wing, which switches from jet fighter to ground vehicle, and the Rock Pot.

Magmar's Stone Wing changes from a jet fighter into a land vehicle, and it was the only Rock Lords vehicle Bandai also sold in Japan.

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