Master Onion first appeared in PaRappa the Rapper, the rhythm game released for the original PlayStation in 1996, where he trains the paper-thin dog PaRappa in karate and teaches him to believe in himself. His short, chant-like instructions became one of the game's most quoted moments, and players later shared them in playthroughs, remixes and reaction videos. Because the character is so visually distinctive and the phrase is so easy to repeat, the sound still works as a quick shorthand for training, discipline and retro PlayStation nostalgia.