Instructions
Versus Mode
Select "Vs. Mode" from the main menu. Choose any character and begin a match.
Defeat your opponent and return to the "Vs. Mode" setup screen.
Repeat 499 times. After 500 completed matches, Young Link will be available for play.
Classic Mode
Select "Classic Mode" from the main menu. Select any character and begin play.
Complete "Classic Mode" and return to the main menu.
Select a different character and complete "Classic Mode" again. After completing "Classic Mode" with ten different characters, Young Link will challenge you. Defeat him to unlock his character for play.
Adventure Mode
Select "Adventure Mode" from the main menu.
Select "Ganondorf" as your character. (Note that to play as Ganondorf, his character must first be unlocked. To do this, complete Event 29. Ganondorf will challenge you. Defeat him in battle to unlock his character.)
Complete "Adventure Mode" with Ganondorf. Young Link will now be available for play.