When you purchased a game from the now-defunct Wii Shop Channel (closed permanently in January 2019), Nintendo would send a WAD file directly to your Wii’s internal memory or SD card. That file would then install the game channel onto your system menu.
While the prospect of playing hundreds of classic games for free sounds tempting, there are substantial risks involved. wii wads free
: Virtual Console (VC) and WiiWare games originally purchased from the now-defunct Wii Shop. Forwarders When you purchased a game from the now-defunct