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This location exists primarily within the Adventures of Sonic the Hedgehog continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.

Submerbia and the Labyrinth Zone, located underwater, they are the great cities of the sea. Fragile, but not without their own defenses, both places have something for Robotnik and he'll do anything to get it.

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