Doraemon: Nobita's Dinosaur

Nobita stumbles upon a fossilized dinosaur egg and, with the help of Doraemon's gadgets, manages to hatch and raise the dinosaur. Realizing they can't keep it forever, Nobita reluctantly decides to send it back to prehistoric times. But when a group of hunters from the future threatens the dinosaurs' survival, Doraemon and his friends travel to the past on a mission to protect them. Their journey becomes a grand adventure in a world of ancient creatures and danger.