After bringing a fossilized egg back to life with the Time Cloth, Nobita finds himself the owner of a baby dinosaur. Everything is fine until it grows up. Nobita and friends use Doraemon's time machine to return it back to
Doraemon: Nobita's New Great Adventure Into the Underworld - The Seven Magic Users
Tom and Jerry Blast Off to Mars!
Doraemon: New Nobita's Great Demon - Peko and the Exploration Party of Five
Doraemon: Nobita's Treasure Island