Myron Giant is an imaginary friend who has made no major appearances, but makes minor appearances in most episodes in Seasons 1 and 3. His most prominent scene is in the episode Bad Dare Day, where he looses a dare to Bloo, who challenges him to eat a barrel of pickles.
He is a huge robot with an oval shaped head, a black tube, a cadet blue circle and huge arms and legs.
Myron Giant is based on the title character from the movie The Iron Giant. The movie was one of the first animation jobs of Lauren Faust, the developer, supervisong producer, character designer, storyboard artist and story editor of Foster's Home for Imaginary Friends.His name is a wordplay on "Iron Giant" and Myron, the name of the ancient Athenian sculptor famous for his Discobolus statue.