The Triforce is a sacred item that appears throughout the The Legend of Zelda series.
In the Super Smash Bros. (series)
The Triforce appears as the symbol of the Legend of Zelda characters in all 3 games of the series. In Melee, Zelda's and Shiek's Target Test stages, it appears as structures. It also appears in the Underground Maze of SSBM's Adventure Mode as a goal one must reach to complete the stage. In Brawl and 3DS / Wii U, it is seen in Link's and Toon Link's Triforce Slash, as it traps the opponent while Link or Toon Link slashes them.