Stage select:
To unlock the stage select option, beat the game.
Secret map locations:
To uncover the locations of the secrets maps, beat the game. A map symbol will appear where the secret maps are located.
Hub update:
To unlock the Hub update, collect all treasures.
Gold Wario room and throne:
To unlock the Gold Wario room and throne, collect all treasures.
Music:
To unlock a levels music for play at the Media Room, beat all challenges on that level.
Ending song:
To unlock the Ending Song for play at the Media Room, beat all missions.
Crown icon:
To display a crown next to your name, beat all stages.
Source: http://www.gamingcheats.com/wii/11652/wario-land-shake-it-cheats.html
