Event 29: Triforce Gathering
Link and Zelda team up to fight Ganondorf. The player is Link and the CPU-controlled teammate is Zelda, who aids the player with fighting Ganondorf, also a computer. If the player (Link) or Zelda is KO'd, the event match is a failure, and the player has to try again, which is why it is ideal for the player to attack Ganondorf with Zelda.
By successfully completing the match, Ganondorf will appear as a challenger (if he is not unlocked already), and the player (as Link) will have to fight him on Final Destination. Once Ganondorf is defeated, he is unlocked and thus playable.