Use USB Loader GX via vWii and you could use a Forwarder.
Make an installable Wii U Package with Techmoons Injector and install with Wup Installer.
These your best way of running the Wii Games.
GC Games can also be ran with additional Nintendont.
Wii U Games need to be installed via Wup Installer or extracted to SD:/wiiu/games/game and ran with Loadiine not recommended it will run terribly if at all.
You really should just checkout the Tutorial Section under WiiU.