Doraemon: Nobita's Secret Gadget Museum (Doraemon: Nobita no Himitsu Dougu Museum) is a 2013 Japanese anime film part of the Doraemon film series.
Story: One day, while Doraemon is taking a nap, his bell is stolen. The person who stole Doraemon's bell is mysterious thief DX. By using a Sherlock Holmes set, Nobita discovers that a clue for the case is at a secret tool museum, which is in the future. So, they decide to all go to the future. At the secret tool museum, various secret tools have been stolen by mysterious thief DX.
When Doraemon was asleep, a famous thief came and stole his cat-bell. Without his cat-bell, Doraemon started to act more and more like a normal cat. In order to stop this, Nobita, Shizuka, Suneo, and Gian decided to go and search for his bell. They went to a factory where all the Doraemon gadgets were made. They were fascinated by all the tools and most of all, they saw the very first "Anywhere Door " ever made!
