Doraemon: Nobita and the Knights on Dinosaurs

Original title: 映画ドラえもん のび太と竜の騎士

Directed by Tsutomu Shibayama

Nobita tries to prove to Doraemon and his friends that dinosaurs are still alive, and, after finding an underground cave, discovers a hollow earth civilization of knights and saurian steeds that Suneo must be rescued from.