In Super Smash Bros Melee, released for the Nintendo GameCube in 2001, hidden fighters could be unlocked by meeting certain conditions, and their arrival was marked by a challenger announcement before a one-on-one battle. That brief moment became familiar to players who spent hours unlocking the full roster, and the sound later travelled beyond the game through gameplay videos, streams and edits. It remains popular because it instantly frames any newcomer as a challenger, borrowing the excitement of unlocking a secret character.