Well, before anything, this is actually assuming your Wii is in the latest version. You need to patch the System Menu IOS in order to run vc/ww games that weren't legally purchased from the Wii Shop Channel (someone correct me if I'm wrong, please). However, I might be wrong, I'm not 100% sure about this. The best thing you can do to clear this out is to run sysCheck through the Homebrew Channel to see how your IOS setup is: https://gbatemp.net/threads/syscheck-hacksden-edition.356133/, then see if it is possible.
Patching IOS 80 can be a bad decision though, also installing wads without being careful has a considerable chance of banner bricking the console (make sure you have priiloader). If you don't want to mess up with this there's an alternative: you can try using a backup loader that supports vc/ww emulation and use it to run the games from sd/usb without installing them. Sorry for delayed answer
^ That's why I could never get far into LGPE; now *that's* "too different", with so many changed and removed mechanics and species and moves that it felt so fundamentally anti-progress, not fun at all.