Doraemon the Movie: Nobita's Great Battle of the Mermaid KIng

Nobita dreams of exploring the depths of the ocean, prompting Doraemon to use his futuristic gadgets to create an enchanting underwater experience high above sea level. However, when the illusion fades, they find themselves unexpectedly hosting a mermaid named Sophia, a princess from an ancient civilization beneath the waves. As Nobita, Doraemon, and their friends—Shizuka, Gian, and Suneo—forge a bond with Sophia, they are invited to her majestic underwater kingdom.

Their journey takes a dramatic turn when they discover a long-standing conflict between the mermaids and a rival tribe that has exiled them from their homeland for centuries. United by friendship, Nobita and his companions join Sophia on a quest to locate a fabled sword believed to have the power to restore harmony to the ocean depths, embarking on an adventure filled with challenges, camaraderie, and the hope of peace for both worlds.