Slimestone is an evil robotic Rock Lord in Magmar's tribe. He turns into a silver rock and has a Slime Gun.
The Slimestone prototype, seen in some Tonka literature, had a different head, and black interior color, much like his animation model in the film.
Slimestone is a rock warrior with a different personality. Short, squat, and disgustingly sinister, Slimestone enjoys wallowing in pools of boiling oil. Slimestone delights in using his slimegun to smear enemies with evil-smelling sticky stuff thats impossible to get off!
In the story Cultural Appropriation by Fun Publications it was revealed that Rock Lords Saberstone, Slimestone, Stone Hook and Tombstone teamed with the GoBots Dozer, Good Knight, Hans-Cuff and Royal-T to explore 59th Level when the Cataclysm threatened to destroy the GoBots home universe.
Slimestone was featured in the 2016 Ask Vector Prime story Echoes and Fragments, set during the events of The Transformers: The Movie. The manipulations of the evil Gong and Sideways resulted in various GoBots, Rock Lords and Starriors swapping places with characters during the events of that film. When the Autobots crashed on Quartex Tombstone sent Slimetstone to inform Magmar. He later joined Spearhead in flanking the Autobots from the South.
Slimestone was among Magmar's forces in "Update From Quartex" by Telepictures Publications in Winter 1987. In the story Magmar's forces attempt to force Boulder's troops into a lava river, but they are saved when Nuggit charges in with several Rockasaurs to help.
- Bandai Rock Lords Slimestone (Europe, 1986)
- A recolor of Machine Robo: Revenge of Cronos Magnarock.
- Turns from humanoid to rock. Comes with his Slime Gun.
- Tonka Rock Lords Slimestone (US and UK, 1986)
- A release of Slimestone for most the US and UK.
- Rock Lords Coloring Book. Golden. 1986.
- Jim Sorenson (w). "Echoes and Fragments" Ask Vector Prime (February 10th, 2016), Fun Publications
- "Of Rocks and RoGuns Part 1". Written by Jim Sorenson. Transformers: Renegade Rhetoric. November 12th, 1986/January 5th, 2016. No. 43, season 1.
- "Of Rocks and RoGuns Part 2". Written by Jim Sorenson. Transformers: Renegade Rhetoric. November 12th, 1986/January 6th, 2016. No. 44, season 1.
- "Combiner Wars Part 2". Written by Jim Sorenson. Transformers: Renegade Rhetoric. December 12th, 1986/February 5th, 2016. No. 65, season 1.
- Paul Kirchner (w, a). "Conquest of the Command Center!" GoBots Magazine (Summer 1986), Telepictures Publications
- Paul Kirchner (w, a). "Update From Quartex" GoBots Magazine (Winter 1987), Telepictures Publications