EvilShenanigans! said:
Don't bother to update to 3.3. If you're at 3.2 stay at 3.2. There are more cons than pros imo. There is no good enough reason to update. Also you can use the new twilight hack beta. It works with 3.2 and 3.3, not just 3.3.
Smash Bros Brawl PAL (released only yesterday in Europe) probably have the 3.3 on it. Didn't bought it yet but chance are high that the update is on the DVD (as the update was dated from March in the update files) and so, required to play the game.
So that's maybe why he's asking, if he's European.
To answer to the question, the best advice is to remove VC games you didn't bought if you have some, same for the WiiWare (even if Nintendo shouldn't be able to see if they are legit or not, as for the moment, the shop recognize them as "legit games" even if they originally aren't), remove the twilight hack, then do the update, then reinstall everything, so let's summary.
- Uninstall any VC/WiiWare games downloaded from the web and installed with Wad Installer or such appz (not required, should work without doing that, but the best thing is to remove it, it take a few seconds so), and everything you installed from .wad found on the web (Homebrew Channel, Wad Installer/Uninstaller, Emulators).
- Remove the old Twilight Hack (also not required, as the update will delete it itself if you leave it, but same, the best advice would be to remove it before, it also take a few seconds so)
- Run the update.
- Once the update is done, install the new Twilight Hack, and the VC/WiiWare you uninstalled before the update if you had somes.
- Enjoy.
Remove all those things aren't required, like the Homebrew Channel. Even if you leave it, it won't corrupt your Wii and the channel will always work fine, but that's just a precaution, as it cost nothing.