Mystery colony planet

A mystery colony planet orbiting three suns was briefly visited by Cybertronian combatants during the Combiner Wars. Though home to organic beings resembling Garnak, it also has a distinctly Cybertronian-looking space bridge.
Fiction
2005 IDW continuity
When a laser blast fired by Swindle hit the control panel of Metroplex's space bridge, the Titan locked onto another space bridge on an organic world home to a volcano and a giant temple in the shape of a head. A brawling Devastator and Superion fell through the portal, quickly followed by Menasor and Defensor. The newly-combined Optimus Maximus soon followed them through, You, Me, and the Universe and, with his Autobot allies, managed to force Menasor and Devastator back through the space bridge to another world. All That Remains
Notes
- "Garnakworld" is something of an outlier among the planets seen in Combiner Wars -- though one of the locations that Metroplex locked onto and home to its own spacebridge, it never comes up again as part of the "thirteen colonies" that ran through IDW's comics in the lead-up to Transformers: Unicron. If one wanted to no-prize it, it might be possible that the planet is a previously unseen part of one of the other colony worlds such as Eukaris, Tsiehshi or Prion.
- If the species seen on the planet were Garnak's species, it's possible that they were the "collective" that sold Garnak and Codder to the Ilxians.

