Soundwave on 31 October 2018
It's probably largely ancillary markets like Latin America, Eastern Europe, Russia, India, etc.. I don't know too many North American retailers that still carry any Wii software, even Wii U has largely been cleared out. I believe MKWii also is preloaded with Wii Mini consoles, so if Nintendo is still shipping a tiny amount of those or have deadstock that they're moving out, that likely could account for a chunk of that.
