Kiryu, also known as Mechagodzilla, first appeared in Godzilla Against Mechagodzilla in 2002, with a return in Godzilla: Tokyo S.O.S. the following year. Unlike earlier Mechagodzillas, Kiryu was built around the skeleton of the original Godzilla, giving it a tortured, half-living presence that fans still discuss. Its distinctive mechanical roar has since circulated in fan edits, kaiju compilations, and soundboards, where it is used as shorthand for a colossal, man-made monster waking up.