Doraemon Nobita's Mermaid Legend (movie)
Doraemon Nobita's Great Mermaid Naval Battle (Movie)
Doraemon Nobita's Great Battle of the Mermaid King (Movie)
Doraemon Nobita's Mermaid Legend The Movie
Doraemon the Legend 2010 Movie
Doraemon The Movie : Nobita's Great Battle of the Mermaid King
ドラえもん のび太の人魚大海戦 (Japanese)

Written by: Yuichi Shinbo
Starring: Wasabi Mizuta, Megumi Ohara, Yumi Kakazu, [[Subaru Kimura]], Rie Tanaka
Distributed by: Toho
Release date(s): March 6, 2010
Vintage: 2010-03-06
Premiere date: 2010-03-06 (Japan)
Country: Japan
Language: Japanese

Preceded by: The New Record of Nobita: Spaceblazer
Followed by: Nobita and the New Steel Troops: ~Angels Wings~

Plot:
When Nobita feels like diving in his hometown, Doraemon uses a Underwater Pump Simulator (架空水面シミュレーター・ポンプ?) to pump all the water out of Tokyo, causing the entire city to go underwater. That night, Doraemon and Nobita use a Diving Mask Simulator to dive underwater. Later on, lots of fish, and a shark attack Doraemon and Nobita. So, Doraemon puts a stop on the Underwater Pump Simulator, but there is a girl named Sophia, lying down on the bushes in his neighborhood.