Dragon Ball Z: The Return of Cooler

The Big Gete Star is an entity that's attached to planet New Namek, sucking its energy and putting the Namekians at risk. Dende, Earth's guardian, learns about the situation and asks Goku and his friends for help. Upon arriving on New Namek, they find that the Namekians are being held captive by robots led by Cooler, who claims he was resurrected by the Big Gete Star's technology.