A water and metal type Etherian.
One of the three legendary titans, Atlantitan can be seen journeying through the darkest depths of the ocean. It has been observed scuba diving for up to weeks without coming up for air, and its hardened steel body is able to withstand the pressure of the deepest oceanic trenches.
Atlantitan is a large, bulky, golem-like monster taking the appearance of a deep sea diver. It has cannons for arms. Its shoulders are also shaped like bubbles.