Doraemon: Nobita’s New Dinosaur

Nobita visits a dinosaur exhibition with his friend. During a fossil excavation there, he vows to his friends that he will discover a dinosaur, joking that he will eat monkey nuts with his eyes if he fails. As he leaves the excavation, he trips over a rock and suspects that he has found the fossil of an egg. He goes home and convinces Doraemon to use the time-wrapping cloth on the fossil egg, and two Sinosauropteryx emerge. [Nobita] names the twin dinosaurs Kyu and Myu and, under the advice of Dr. Dinosaur, learns how to take care of them. The two fast-growing creatures gradually show differences in their development. Myu has learned to fly, but not the smaller Kyu. As Kyu and Myu grow, Nobita’s room becomes too small for them, so they use the Breeding Diorama Set to give Kyu and Myu more freedom.

The day Nobita completes his dare arrives. When his friends arrive, they discover that Nobita has indeed found a dinosaur. At this point, Kyu and Myu make a lot of commotion, leading Nobita’s Mother to come upstairs. They try to hide Kyu and Myu by using the spatial movement crayon, however, the townspeople see Kyu and Myu. Understanding that Kyu and Myu have reached their full size, they should return to their time. The next morning, the five of them climb into the time machine.

With the Time Furoshiki, Doraemon’s party goes back to the early part of the Late Cretaceous, calculated from the time of the fossil egg. However, they discover that they are in Late Jurassic Colorado, the time where the Torvosaurus, Allosaurus, Diplodocus, Brachiosaurus, Camarasaurus, Apatosaurus, Hesperosaurus and Stegosaurus all live. As they rush to return to the time machine, Nobita trips and loses the breeding diorama. The scene shifts to a room where the actions of Nobita and his friends are secretly monitored by Jill, who has now shape-shifted into a white monkey, as he answers a call by a mysterious woman named Natalie. Unaware that they are being monitored, the group searches for Kyu and Myu’s comrades, and finally reaches the sea. Along the way, they meet dinosaurs such as a Tarbosaurus and a Sinoceratops.

When Gian and Suneo go ahead to find more clues about Kyu and Myu’s kind, they are captured by Jill, and [Doraemon] and the others are in danger of being attacked by a large Tupandactylus. Nobita and Kyu fall into the sea, but they are helped by a Futabasaurus that is very similar to Piisuke, who takes them to a mysterious island where they reunite with Doraemon, Shizuka, and Myu. This is an island inhabited by dinosaurs that look like them, the same species as Kyu and Myu. Nobita tries to get the two back to their group, but Kyu is scratched and refused by the group because they believe Kyu is different. It may be because, unlike the new dinosaurs, Kyu cannot fly and its tail is shorter. Nobita declares that Kyu can fly by itself.

Meanwhile, Jill and Natalie, who were on their way to the island on a submarine, face a looming deep impact. [Gian] and [Suneo], who are watching them escape from the cage, study the map and see the truth of the mysterious island. At the time, Nobita and Kyu, who had just started flying training, have a misunderstanding and the training is disrupted. Nobita looks down, finds encouragement, and as he searches for a note with a stick, notices a figure practicing alone. He begins training to help Kyu realize a reverse climb. At that moment, a huge object shines in the sky and falls.

Gian and Suneo push ahead, and together with Doraemon they learn that this is the event that caused the Cretaceous extinction when a meteorite struck the Yucatán Peninsula in Mexico 66 million years ago. Nobita tries to turn the meteorite away with an opposite-direction device, but the Time Patrol appears and Natalie stops the party’s activities. Jill reveals that this era is being watched as a one-time patrol, and insists that history cannot be changed, even if it’s a topic close to Nobita’s heart. Nonetheless, Nobita, blocked by the patrol, remains determined. Kyu and Myu rush to shield Nobita, and Doraemon and the others who try to protect him are detained as well. Yet when Jill holds a check card on Nobita and Kyu, the card emits light, and the Time Patrol ultimately chooses not to interfere in their actions.

As the team fights to help Kyu, Myu, and the other dinosaurs, Gian and Suneo reveal that the island is actually the breeding diorama set, which Nobita dropped in Colorado but that has since grown and become active. They decide to move the dinosaurs off the island using the Space Movement Crayon and launch a rescue operation to shield them from the meteorite’s impact, leveraging the diorama’s weather-control function. As the meteorites approach, a Tupandactylus strikes Nobita and Doraemon as they draw the protective circle. Nobita clings to the Tupandactylus while Kyu, still learning to fly, makes a valiant effort to reach him. After many attempts, Kyu finally takes flight, moving from a tentative glide to true flapping, marking the dawn of a new kind of evolution. Kyu rescues Nobita just in time, and the duo’s bond becomes a symbol of progress—turning dinosaurs into birds in a heroic moment.

The dinosaurs are saved and settled on the island, and Nobita and his friends bid farewell to Kyu and Myu. Jill’s impassioned proclamations echo the concealed care behind their unusual journey, illustrating how a single act of kindness can shape a larger story. Returning to the present, Nobita challenges himself to perform a bar reversal he had once failed, and this time succeeds.