Instructions
Turn on the Wii. Select the "Wii" icon at the bottom of the Wii Channel Menu.
Select the blue arrow to move to the "Wii System Settings 2" menu options. Select "Parental Controls." Select "Yes."
Select "I forgot" and enter the answer to the secret question you selected when setting up the parental controls. If you do not know the answer, the only way to retrieve a reset code is by contacting Nintendo's customer service at 800-255-3700.