Maxinger X contra los monstruos (1977)

After a forced landing on Earth, the crew of a research ship from the planet Gailar decide to remain hibernating and wait to be rescued. Nuclear tests carried out by humans damage the system and some of the aliens awaken. Unable to return to their place of origin, the Gailarians decide to conquer Earth. Only a scientist can stop them, who has designed a ship capable of transforming into a gigantic robot.