Serton

Little is known about the outer planet of Serton. The elderly Autobot Kup was once stationed there, where he encountered a spaceship with similar invisibility capabilities to the one possessed by Sarah Sanders.

Fiction

Find Your Fate Junior

The Invisibility Factor

After the Decepticons' plot to steal Sarah Sanders's invisibility technology had been foiled by Hot Rod and the Autobots, Sarah took off in her ship, vowing never to let it fall into dangerous hands. As she left, Kup reminisced about his days on Serton, and began one of his stories about his adventures there. The Invisibility Factor