AnyTitle Deleter can do what you want.
I've looked all over the forums and can't find a clear answer for this. I want to clear some old installed channels on my Wii. However, I'm missing some of the wads I originally used. I've read that I HAVE to use Wad Manager WITH the wad I want to remove in order to remove all traces of the installed wad. So am I stuck with data on my Wii I no longer need, or is there a way to yank out all those pesky bits? Thanks in advance.
you can delete them through data management, or anytitledeleter.
Anytitledeleter will delete more of it, data management less, and wad uninstall removes most.
(EX - uninstall wad > anytitledeleter > remove through data management)
I'm willing to bet DOP-Mii, or DOP-Mii Wiibrew Edition will be able to remove the channels or update them as you wish.