"One benefit that Nintendo players have over other console versions of some games is the option to unlock exclusive content through the Game Boy Advance to GameCube connection. The Sands of Time is one of those times in which Nintendo followers get the goods. By connecting the GBA version to the GC version, players can unlock bonus material for the GC version of the game. Yet the best feature of the connection is the ability to unlock the original Prince of Persia from 1989 that can be played on the GameCube. This option takes a little work though, as players will have to unlock 3 secret switches during the adventure on the Game Boy Advance version. A reward which is well worth the effort."
O sea, que el juego original sólo se desbloquea jugando desde una Gamecube.