The music comes from the underground cave levels in New Super Mario Bros U Deluxe, the Nintendo Switch version of the Mario side-scrolling platformer. Cave stages in Mario games have long used a distinct, lighter theme to separate them from overworld levels, and this version keeps that tradition with a catchy, upbeat arrangement. Online, the short loop has become a handy piece of background music for gaming videos, edits and memes, especially when a creator wants an instantly recognisable Mario sound without using the main overworld theme.