Updating with wiibrew
If the card goes only partway in, it was inserted backward or upside down.A loading screen appears, followed by a black screen with white text telling you to demand your money back if you paid for this software.Below are some of the best apps you should get for your hacked Wii.These are called homebrew applications because they are not officially approved for the Wii console and are only installable through the special Homebrew Channel app.If you have a new Wii, this procedure reportedly won't work until there is at least one message in your Wii Message Board.
It also supports MP3s, can be used as a picture viewer, and can access radio station services.
To prevent Nintendo from automatically updating your system, turn off Wii Connect24.
To do so, select Options, then select Wii Settings. Also, prevent new games from attempting to update the system.
The operating system version number appears in the upper-right corner.
If the Wii runs version 4.3, use the Letter Bomb method; if the Wii runs version 4.2 or earlier, use the Bannerbomb method.