This roar is tied to the Millennium era of Godzilla films, the run of movies released by Toho starting in 1999 after the Heisei series ended. Fans often associate it with Godzilla 2000 and later Millennium appearances, where the creature had a distinct updated design and vocal sound. Online, the roar spread through kaiju edits, versus videos, and nostalgic monster tributes. It is still popular because it sounds bigger and harsher than many classic versions while staying unmistakably Godzilla.