Here's why:
* Focus on Gameplay: The game's developers wanted players to experience the game organically and discover secrets through exploration and gameplay.
* No Code Input: The Wii's controllers don't have a convenient way to input text codes, unlike other consoles.
* Alternative Unlockables: The game does offer unlockable content through gameplay, like completing levels or collecting studs.
While you can't use codes, you can still have a lot of fun exploring the game and unlocking all the secrets!