Gigan first appeared in Godzilla vs. Gigan in 1972, introduced by Toho as a cyborg space monster with a buzzsaw in its abdomen and hooked blades for hands. The character later returned in Godzilla vs. Megalon and Godzilla: Final Wars, building a cult following among kaiju fans. Its unusual metallic roar has been reused and remixed in fan edits, games and soundboards for decades. Online, the loud version circulates as a quick reaction and scare effect, kept alive by Godzilla fandom and meme editors who love classic monster sounds.