Mutiny's Castle was a levitating fortress that originally sat atop the back of a gargantuan reptile known as Titanisaur though it could fly on its own. During the battle with Grunchor in Grunchor on the Loose, Captain Mutiny landed the castle on the monster's head, but retreated when a strike from the Defender Torozord's Defender Axe caused some damage to the castle. It served as the base of operations for Captain Mutiny and his crew, before it was destroyed by Trakeena after exiting the Lost Galaxy in pursuit of Terra Venture.