Doraemon: Nobita's Great Battle of the Mermaid King

Released 2010 · Adventure, Family, Animation, Fantasy, Science Fiction · 100 min · ★ 6.8/10 · Directed by Kōzō Kusuba

Nobita, Doraemon, and the rest must come to the aid of mermaid princess Sophia, whose undersea kingdom is suffering under the weight of a war. Their only hope lies in a mythical sword from the planet Aqua...