Doraemon Movie 04: Nobita no Kaitei Kiganjou

Synopsis

During a summer trip, Nobita and his friends explore the Pacific Ocean in Doraemon's submersible. Their journey takes an unexpected turn when they are rescued by inhabitants of the underwater kingdom of Mu after their vehicle malfunctions. They soon learn that the robotic rulers of Atlantis plan to destroy Earth using nuclear weapons. The group, aided by a boy from Mu, tries to thwart the robots' plan but are captured. In a climactic moment, Doraemon's submersible sacrifices itself, disabling the controlling computer and averting disaster. The heroes are celebrated for saving the planet.