A movie about the life of Doraemon from birth, before coming to Nobita. The movie is sort of a prequel to the entire series, it showed the life of Doraemon before traveling to the 20th century: How he was made,
Doraemon: Nobita and the Robot Kingdom
Doraemon: Nobita's New Great Adventure Into the Underworld - The Seven Magic Users
Doraemon: Nobita's Dinosaur
Doraemon: Nobita's Great Adventure in the World of Magic