Gollo

A playful green alien creature from the far-distant planet Zar, a gigantic, green-skinned child-creature with large purple eyes and the frisky disposition of a friendly baby dinosaur, who arrives on Earth in November 1957 and wreaks constant, albeit completely unintended, havoc with his uncanny ability to "change shape" at will "to imitate any object"—as when he transforms himself into an ocean liner and, churning unthinkingly through the waters of Metropolis Harbor, only narrowly avoids causing a disastrous collision between two ferryboats—until he is finally taken in tow by Superman and retuned safely to his worried parents on the planet Zar (Act No. 234: "The Creature of 1,000 Disguises").