Doraemon: Nobita's Dinosaur

Nobita claims he will be able to find a living dinosaur. As Doraemon refuses to help him, he digs on a hillside, but instead earns punishment from a landlord who forces him to unearth a hole in the ground. He finds an egg-shaped stone underneath and quickly uses a time wrap to return it to its former form. After warming it, the egg hatches to reveal a plesiosaur, who is subsequently named Piisuke by Nobita.