Instructions
Power on the Wii console.
Move the cursor of the Wii remote over the ̶0;Wii̶1; button located in the bottom left of the Wii "Home" screen. Press the ̶0;A̶1; button on the remote. The Wii "Main Menu" screen appears.
Move the cursor of the remote over the ̶0;Wii Settings̶1; icon indicated by a wrench. Press the ̶0;A̶1; button on the remote. The "System Settings" screen appears.
Click the left blue arrow located in the bottom of the screen two times to access the Wii "System Settings 3" menu.
Click the ̶0;Format Wii System Memory̶1; option.
Click the ̶0;Format̶1; button.