Dark Science Empire Deathdark

From the time when iron was discovered in ancient Turkey, the Dark Science Empire Deathdark (暗黒科学帝国デスダーク) have existed to move the world in the shadows. United by Fuehrer Taboo, they are based from the Dark Giant Castle Destopia (暗黒巨大城デストピア) that launches giant robots from its gate. It is usually underwater, but it can fly. When in flight, its high-power propulsion winds wreak destructive chaos underneath.