Kôzô Kusuba's entertaining aquatic adventure "Doraemon: Nobita's Great Battle of the Mermaid King" follows Nobita and his pals as they attempt to prevent the destruction of a mysterious undersea nation. The story appeals to a wide age range of readers by skillfully fusing friendship, fantasy, and environmental awareness. The film's brilliant animation, striking colors, and recognizable Doraemon devices provide the narrative fun and inventiveness. The film embodies the endearing essence of Doraemon, advocating for fundamental principles of bravery, camaraderie, and preservation of the environment. The movie appeals to both young and senior viewers.