An sentient underwater vehicle with a distinct personality that develops a fondness for Shizuka. It serves as a crucial reconnaissance and transport tool, providing vital footage of enemy movements. Its self-sacrificial crash into the Poseidon computer is the decisive action that neutralizes the Atlantis threat, marking it as a pivotal, albeit brief, ally in the underwater conflict.
Nobita and the Buggy share a companionable alliance during the initial exploration phase.
Doraemon and the Underwater Buggy operate as a unified technological force for reconnaissance and transport.