Hellgaille Palace (ヘルガイユ宮殿 Herugaiyu Kyūten) is the base where the Barbaric Machine Clan Gaiark are located. It is located on an unknown island in the Pacific Ocean. The palace in itself takes the appearance of a mass of moving machinery and smokestacks spewing dark air pollution into the skies; with most of the main locations within the palace being underground. The main center of the palace is a meeting room where the Pollution Ministers and other Gaiark executives tend to plot and scheme; the room includes a machine for the creation of Banki Beasts and a bar where the Pollution ministers tend to get drunk on oil after particularly bad defeats against the Go-Onger or the Engine. However it's central element is a special giant gear known as the "Deus Haguru Magear", which is used by the s