Doraemon: Nobita's Great Battle of the Mermaid King

Nobita and his friends use Doraemon's gadgets to transform into merpeople and venture into a magnificent underwater world, where they befriend a mermaid princess fleeing from an invasion of her kingdom. Racing to protect their new friend and her people from destruction, the gang must rally the ocean's creatures for an epic underwater battle. A colorful and exciting Doraemon adventure that makes full use of its ocean setting.