Not to mention, best as I can tell, VGCharts doesn't cover sales of games when they're under 10,000 copies.
Overall, I think Spyborgs sold no copies because there's literally nothing interesting about it. If you want something like this game, virtually any other game in the genre on any platform allowed for more characters, and had more compelling aesthetics among other things. Take a look at it and ask if you'd ever even play the game, if it were added to your gaming catalog, at no charge. For me, honestly, the answer is no, I'd never even touch it.
Capcom could take this in the piracy direction, though. That would be hilarious.
"Oh yeah, we hopped online and saw about 70,000 people pirating our game. It's just too easy to pirate on the Wii, we're done with the machine now."