Doraemon: Nobita and the Castle of the Undersea Devil

The action shifts between the sunlit coast and the hidden depths of Mu, an underwater kingdom inhabited by sea people. Atlantis, a robotic rival civilization, lies deeper in the Bermuda Triangle and houses Poseidon, its main computer. The journey spans the Atlantic’s surface and its mysterious undersea corridors, with travelers moving via Doraemon's gadget-assisted methods.

🪸 Adventure

The group embarks on an expedition beyond their normal camping trip, entering uncharted underwater realms and encountering new civilizations. They must navigate treacherous seas, strange technologies, and looming dangers as they seek Gian and Suneo and a legendary treasure ship. The voyage tests their resilience, teamwork, and willingness to take risks for friends.

🤝 Friendship

The story centers on how Nobita, Doraemon, Shizuka, Gian, and Suneo rely on one another to survive the perils of Mu and Atlantis. Conflicts arise, misunderstandings occur, yet their loyalty helps them overcome barriers. The group learns that trust and cooperation are essential when facing a larger, unfamiliar world. Bonds are strengthened through acts of sacrifice and mutual support.

🛡️ Courage

Characters confront powerful enemies, from sea guards to Poseidon, and endure near-fatal dangers to protect friends and prevent catastrophe. Doraemon’s gadgets are used to outsmart adversaries and navigate deadly defenses. Facing a potential volcano-triggered disaster, they choose to act bravely despite fear.

🧭 Discovery

The voyage reveals hidden civilizations, advanced underwater tech, and political tensions between Mu and Atlantis. The team uncovers the truth about the sea people saving Gian and Suneo, and learns that there are consequences when humans reveal secret worlds. The adventure becomes a journey of learning about ancient legends and modern technologies coexisting.