Using a brain wave controller that Doraemon pulls out of his pocket, Nobita has the robot perform gymnastic maneuvers in a mirror world before bringing Shizuka Minamoto to join the fun.
There, they build the robot which Nobita christens "Zanda Claus" as he believed the sphere summoning the parts is from Santa Claus. Learning of the robot parts, Doraemon admits to Nobita that he has nothing to do with it, and the two use the Opposite World Entrance Oil and the Roll-Up Fishing Hole to enter the World Inside the Mirror, an alternate mirror world without people. A frozen Doraemon follows soon after, covered in ice before being thawed out and with a cold. After Nobita uses the foot to sled down, crashing into his room through the Anywhere Door, the bowling ball follows him home through the door and another robot piece falls into his backyard. Nobita soon follows and discovers a strange bowling ball-like orb which starts blinking with a pulsating light, and summons what looks like a giant robot's foot. His fit only annoys Doraemon who uses his Anywhere Door to get away from the summer heat, to the North Pole. The movie's plot involves Nobita, who throws a temper tantrum because he wants a really large RC toy robot in order to upstage the rich kid, Suneo Honekawa, who has been showing off the new robot that his cousin made. ( August 2021) ( Learn how and when to remove this template message) Please help improve it by removing unnecessary details and making it more concise. This article's plot summary may be too long or excessively detailed.