At the Mini-Game selection screen, scroll to a locked mini-game and enter one of the following codes.

Code	Effect
A, A, Down, Up, Down	Bird Drop.
A, Down, Up, Up, A	Trampoline Tango.
Down, A, Down, Down, Up	Rolling Party.
Down, Up, Up, A, Up	Rope Catch.
Up, Down, Up, A, Down	Pearl Diver.