ActionReplayを使うと「ゼルダの伝説 風のタクト」のβバージョンがブレイ出来るらしい。

Using the cheat code system ActionReplay, a clever group of gamers stumbled upon fourteen playable Zelda maps never meant for gamer’s eyes. Two gameplay videos, seven screenshots, and all the codes compiled.
Zelda: The Lost & Found beta tester’s Wind Waker levels – hidden in game! – Digg

下記のサイトで映像とCheat Codeが紹介されている。

Believe it – coders discovered ActionReplay codes that ulock trippy MonkeyBall-looking worlds that look completely like any Zelda experience you’ve ever played.
Zelda: The Lost Found beta Wind Waker levels