If your heart is set on having a dedicated Wii Menu channel with the Diddy Kong Racing logo and music, then pursue the WAD method. Just go in with eyes wide open: you may need to try two or three different source WADs from different “injectors” before finding one that works on your specific Wii system menu version (4.3U/E/J).
Unofficially, the homebrew community has created tools to inject ROMs (read-only memory files of games) into the Virtual Console emulator wrapper. This creates a custom WAD. diddy kong racing wad wii work
For everyone else, fire up Not64, grab a Classic Controller Pro, and enjoy the magic of Banjo, Conker, and that pesky silver coin challenge—without the WAD-induced headache. If your heart is set on having a