Trivia: The Iron Giant has only 53 words of dialogue in the entire film.
Trivia: Homer Hickam's father's name is actually Homer Hickam Sr.; in the movie, the father's name was changed to John. The assumption would be that the name was changed in the movie to avoid confusion between father and son.
Trivia: The ancient legend in the tablet is very different in both versions. In the English version, it says that the Titans of Ice, Lightning, and Fire must be stopped by collecting the three treasures and awakening the beast of the sea, and the world will turn to Ash. In the Japanese version, it says that the God of the Sea will battle the Gods of Fire, Ice, and Lightning, and will fail, thus a superior master will rise up and save the world. The last line "and the world will turn to Ash." is not in the Japanese version, as Ash's Japanese name is Satoshi, named after the creator of Pokémon, Satoshi Tajiri.
Trivia: During the end credits, the voice of Brain is Don Adams, the original animated Inspector Gadget, who also performed as the inept Maxwell Smart in the old television series Get Smart.
Trivia: When they show the ark with the animals on it, Mickey and Minnie mouse can be seen - you have to look closely because they are pretty tiny.
Trivia: Ray Walston, who plays Nineenert, played the original Uncle Martin in the TV show "My Favorite Martian." In the movie he says his antennae are always giving him problems and everything is in black and white and that his gum had lost its flavor in '66. The original TV show was in black and white and its final season was in 1966.