Synopsis

Doraemon sets up a secret hideout in an underground cave, but Suneo gets separated from the group. When everyone else makes it back out, they realize he's missing—and the entrance collapses. Unable to use the original way in, they find an alternate passage that leads them into a dinosaur-filled world. A soldier named Vanho finds them and claims he's already located Suneo. When they're finally reunited with him, they discover Vanho's true agenda: his people want to capture Doraemon's group as test subjects and use them to conquer Earth's surface.

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Genres