You must have a legitimate copy of Mario Kart Wii (NTSC or PAL). This can be:
The Wii console must be "Homebrewed" (modified to run unofficial software). download mario kart wii deluxe v701 blue v link
Distributing the "ISO" (the full game) is illegal. Modders typically only share the "patch" files to stay within legal gray areas. 💡 Would you like help with any of the following? You must have a legitimate copy of Mario