Bathysphere

The Bathysphere is an object that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It was a submarine that belonged to Rotor Walrus.

Description
Due to being created mainly as a research vehicle, the Bathysphere was never equipped with weapons, which has contributed to its various sinkings.

History
Rotor sets out in his submarine to the Frozen North Sea, upon hearing his mother's voice on his radio in Knothole. Rotor also piloted it to Flicky Island, along with Sonic and Tails in the Sea Fox in order to find out what Dr. Robotnik was up to.