Installing an IOS or channel leaves behind a title & ticket file, which are not deleted by the system menu's data management page.
Any Title Deleter lets you view & delete the IOS's, save files, system menu channels, hidden channels, and custom channels. It really should only be used by the experienced users or unless a guide tells you what to do specifically with it because it's dangerous if used incorrectly.
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<short_description>A menu driven Title deleter with the ability to delete System Titles and System Channels</short_description>
<long_description>AnyTitle Deleter is an application which allows you to completely delete (almost) any title on your Wii. Notable features:
* Deletes previously "Non-Removable" titles, such as IOS, MIOS, some system channels, etc.
* Contains extensive brick protection--You cannot delete your System Menu, its IOS, or some other necessary titles.
* Lists all titles installed on the system in both hex and ASCII format in a series of nice (but console-based) menus.
* Attempts un-installation of titles the "safe" way, and if it fails, will do a more manual "delete" upon request.</long_description>
Regions E, U and J
An SD card (Best results are with non-SDHC cards)
The Homebrew Channel
Any Title Deleter MOD (ATD MOD): http://wiibrew.org/wiki/AnyTitle_Deleter/AnyTitle_Deleter_MOD
Deleting things with AnyTitleDeleter is VERY dangerous. Be sure you know what you delete. NEVER delete a system title unless people confirm you can do so!
2. Run AnyTitleDeleter MOD. You'll see a screen that has a lot of text on it. Basically, you can delete any title now. Go up or down to the right category of your title and press A.
On the next screen, navigate to the title you want to delete and press A. Then say yes to confirm you want to delete the title.
Make absolutely sure you are uninstalling the correct title! Things like IOSs and such should generally NEVER be uninstalled.