Nobita accidentally finds a fossil dinosaur egg mixed with rocks in the dinosaur fossil exhibition site that he had visited before. He returns it to its original state with the 'time blanket'.

Nobita and Doraemon were finding out the truth about a real dinosaur. Nobita saw something under the ocean when they come across a cave that leads to an underground world full of dino-people. Nobita ...

Nobita hatches an egg of Futabasaurus that is a genus of Plesiosaurs flourishing during the Cretaceous in Japan, named it "Piisuke". As Nobita, with getting a help of Doraemon and three friends, tries ...