The Mii victory theme comes from Super Smash Bros. 4, the Nintendo fighting game for Nintendo 3DS and Wii U, where custom Mii Fighters battle alongside characters from across Nintendo history. When a Mii Fighter wins a match, this short fanfare plays over the results screen, giving the created character its own moment of glory. As clips from the game spread through soundboards, meme edits and gameplay videos, the tune became shorthand for any small, self-made victory, and it remains popular because it is instantly recognisable, cheerful and easy to drop over a win.