The Leviathan Battleship was an organism from Phaaze outfitted with technology by the Space Pirates onboard the Colossus, who had fallen under the control of Dark Samus. According to the Metroid Prime Trilogy art booklet and Space Pirate Data, some time after Dark Samus had spontaneously left the Colossus, she encountered a Leviathan during her search for Phaaze. Once she infected it with her particular strain of Phazon, she had the creature open a wormhole as a shortcut to reach her destination. Afterward, she took the Leviathan back to where she had left the Colossus and ordered the Pirates to follow her through her second trip to Phaaze. It was only after reaching the planet when the crew of the Colossus began installing cybernetic weapons, crew quarters and command consoles into the Le