The Mecha Maker

Nobita is planning to make a powerful spacecraft so Doraemon lends him a Mecha Maker to make his spacecraft a reality. They show off Nobita's spaceship to Shizuka, Gian and Suneo. Gian and Suneo borrow Doraemon the gadget and give him some dorayakis as an offer, and they make a better spaceship than Nobita's. However, they proceed to destroy Nobita's spaceship. Doraemon and Nobita make an even better spaceship and get back at them.