도라에몽 The Movie: Nobita's Great Battle of the Mermaid King (映画ドラえもん のび太の人魚大海戦, Eiga 도라에몽 Nobita no Ningyo Daikaisen?), also known as 도라에몽 THE LEGEND 2010, is a 2010 Japanese animated film that was released on March 6, 2010. This movie is part of the celebration for the franchise's 40th anniversary and it's 30th movie anniversary (映画ドラえもん30周年?).
When Nobita feels like diving in his hometown, 도라에몽 uses Underwater 펌프 Simulator (架空水面シミュレーター・ポンプ?) to 펌프 all the water to fill up water. That night, 도라에몽 and Nobita use a Diving Mask Simulator to dive underwater. Later on, lots of fish, and a 상어 attack 도라에몽 and his friends. So, 도라에몽 puts a stop on the Underwater 펌프 Simulator, but there is a girl named Sophia, lay down on the bushes in his town.