Lithone (species)

In the Generation 1 continuity family, Lithone was a planet inhabited by transforming robots whose relationship (if any) to the Transformers of Cybertron is unclear. Lithone was destroyed by Unicron in the opening scene of The Transformers: The Movie, and two of its inhabitants (Arblus and Kranix) seem to have had prior knowledge of Unicron's existense.

From Teletraan I: The Transformers Wiki, a Wikia wiki.