The Iron Giant (1999)

The Iron Giant follows the incredible adventures of young Hogarth Hughes who late one night discovers and befriends an enormous robot fallen from the stars. But Hogarth now has a very big problem: how do you keep a 50-foot-tall, steel-eating giant a secret especially when there’s a nosy government agent asking questions in town and the combined land, sea and air power of the U.S. military mobilizing to demolish the alien invader?