When this utility is booted, it looks for and deletes duplicate Wii Channels, such as the ones you may get from booting a Wii game title from another region and installing an out of region update (for example, Japanese or European Weather and News Channels on a US Wii).

** Use only the version meant for your region, or you will accidentally delete the channels from your Wii’s native region. **

http://wii.waninkoko.info/