an energy source to confront Godzilla with; simultaneously, Apex covertly plans to use it to power Mechagodzilla, now housed within Victoria Peak. Godzilla and Kong clash en route to the Hollow Earth in the Tasman Sea, but ultimately the team finds and retrieves the power source, in the form of "Hollow Earth Energy". After Godzilla and Kong fight a second time in Hong Kong, Serizawa charges the mechanical Titan with the untested Hollow Earth's energies, upon pressure from Apex Cybernetics' CEO Walter Simmons. However, the process unexpectedly allows Ghidorah's mind to possess Mechagodzilla, who then kills both Simmons and Serizawa, goes on a rampage in the city, and faces Godzilla. Tired and wounded from his earlier battle with Kong, Godzilla is easily overwhelmed, and is nearly killed before Kong joins the battle. Kong's axe initially proves ineffective against Mechagodzilla, as its energy was depleted after battling Godzilla. As Mechagodzilla maintains the upper hand, Josh Valentine tampers with its control panel via alcohol spillage, stalling it long enough for Godzilla to supercharge Kong's axe with his atomic breath. Kong then uses his fully powered axe to dismember Mechagodzilla's limbs, and finishes it off by tearing off its head. In other media The various incarnations of Mechagodzilla have appeared in other media associated with the series, such as video games, television shows, and comics. In video games The Shōwa Mechagodzilla appears in the video games Godzilla: Monster of Monsters for the Nintendo Entertainment System, Godzilla for the Game Boy, Super Godzilla for the Super NES (American release; replaces the Heisei version from the Super Famicom release, since the Heisei incarnation's film had yet to be released in America when the game was released), Godzilla: Battle Legends for TurboGrafx-16, Godzilla Generations for the Dreamcast (erroneously using his Heisei counterpart's sound effects) and Godzilla Generations: Maximum Impact for the Dreamcast and the Wii version of Godzilla: Unleashed. The Heisei Mechagodzilla appeared in the video games Super Godzilla (Japanese version, replaced by the Showa Mechagodzilla in the English release) and Godzilla: Monster War, both for the Super NES, Godzilla: Domination! for Game Boy Advance, Godzilla: Save the Earth for Xbox and PlayStation 2, Godzilla: Destroy All Monsters Melee for Xbox and the Nintendo GameCube, and the Wii and PlayStation 2 versions of Godzilla: Unleashed. Kiryu first appeared in the Japanese version of Godzilla: Destroy All Monsters Melee on the Nintendo GameCube. Since the Millennium Mechagodzilla