Twin Star

Toruin (left) and Sperity (right)

Twin Star (ツインスター Tsuin Sutā) is the group name for the diametrically opposed planets Sperity (スペリティ Superiti) and Toruin (トルウィン Toruwin). Autobot Headmaster Highbrow likened them to Heaven and Hell—while Sperity is rich in energy, covered in glistening cities and populated by small robots (prosperity, y'see), Toruin is barren and lifeless, with nothing but rocky deserts on its surface. The two worlds, however, are connected by a massive tunnel-bridge that allows transit between them.

Inhabitants include security officer Dafuna, the young Clang, and a commander.

Fiction

Japanese Generation 1 cartoon continuity

Generations Selects Special Comic

Among other robotic races, the inhabitants of Twin Star were created by Primacron. He used the lifeforce of the previous universe via the Oracle to grant them life. Finale

The Headmasters cartoon

That is one well-endowed robot.

Aware of the massive amounts of energy on Sperity, Galvatron made it one of his targets during the Decepticons’ series of attacks on planets throughout the galaxy. Warnings and laser fire from the surface of Sperity did not to deter him, as Scorponok easily smashed through the planet's defenses, only for their searches to turn up nothing more than a few loose energon cubes.

With the Autobot Headmasters on the Decepticons’ trail, Fortress elected to have Daniel Witwicky, Wheelie and Arcee relocate to Toruin, that they might remain safe in the coming battle. While on the planet, however, they discovered an underground city and realised that the inhabitants of Sperity had used the tunnel-bridge to evacuate civilians and energy to Toruin. With this information relayed to them, the Autobots pulled out as the evacuation was completed and the tunnel-bridge disconnected from Toruin, allowing the planet to drift off through space. Unaware of the deception, Galvatron allowed Toruin to leave, believing there had never been any energy in the first place, and ended the campaign rather than be made to look a fool any further. Battle for Defense of the False Planet

Animated cartoon

Twinstar was a neutral robotic planet in the Milky Way. The AllSpark Almanac II

Wings Universe

Cannonball the 3rd led his crew to Toruin, which resulted in mutiny when the crew wanted to escape to Sperity.

A delegation from the Twin Star Continuum attended a meeting at a Maximal safe house on the edge of empty space. They were found and all massacred by Flame War. Devcon investigated, concluding it was truly Flame War who did it. Tornado - Decepticon Saboteur

Notes

• In The AllSpark Almanac II, Twinstar was part of the Nebulon Republic. This was changed in The Complete AllSpark Almanac.

Foreign names

• English: The Twin Planets (Omni Productions dub), Toluin (Toruin, Shout! Factory sub)