Nobita and his friends embark on a quest to find an ideal land called Paradapia, similar to Thomas More's Utopia. Guided by Doraemon's futuristic gadgets and time-travel abilities, they uncover Paradapia's secrets and face challenges, including encounters with a bounty hunter named Marimba. The story revolves around their efforts to unravel the mysteries surrounding Paradapia, leading to a positive resolution and the anticipation of future adventures.

Nobita requests of Doraemon the Moshimo-box and wishes for the world to become a place where the use of magic is possible. Witchcraft replaces science and technology and everyone makes use of it on their daily lives, except for Nobita, who, like usual, isn't very good at conjuring spells. Frustrated, he plans on returning things to their past state, but his mother threw the Moshimo-box away. One day, Doraemon and his friends meet Professor Mangetsu, who studies magic and magical beings such as goblins, and his daughter Miyoko, and are warned of the dangerous approximation of the star of the Underworld to the Earth's orbit. With the future of the planet at stake, the group must travel to the Underworld and pierce the heart of the Underworld King with a silver dart, as detailed in the ancient texts of The Chronicles of the Underworld. Their attempts are, however, thwarted and Miyoko captured. Doraemon and his friends then decided to use the Time Machine to return to the past and, using Dorami's Moshimo-box, they manage to restore the Earth. The events on the Underworld continue, however, to take place in a Parallel Universe, where Miyoko is still captive. As a result, the group is once again forced to travel to the Underworld and defeat its tyrannical ruler once and for all. (Source: AniDB)

One day, Nobita picks a small rocket from which a small-sized humanoid alien Papi comes out. He came from the planet named 'Pirika' to the Earth to escape from the PCIA army of his planet. At the very beginning, Doraemon and his friends were confused by the small size of Papi, but with the gadget Small Light, they became small and play together. However, the whale-shaped battleship, who chased Papi and came to the Earth, attacks Doraemon and Nobita to catch Papi. Papi blames himself for having involved everyone, but he tries to fight against the PCIA army. In order to protect Papi and his planet Pirika, Doraemon and his friends go to Pirika. (Source: IMDb)

Nobita finds a fossilized dinosaur egg by accident, and with the help of Doraemon's tools, they hatched the egg and began raising the dinosaur. Knowing that they can't keep the dinosaur forever, Nobita was forced to send it back to prehistoric times where a group of hunters from the future threatens to endanger the dinosaurs. Determined to save the dinosaurs from the claws of the hunters, Doraemon and the gang returns to the past and sets out in a prehistoric adventure. (Source: ANN)