Mario Power Tennis......Storms in Japan!The eagerly awaited follow-up to Mario Tennis on the Nintendo 64, Mario Power Tennis, has finally been released on the GameCube over in Japan. But just how well has it done? Well, Camelot's addictive tennis romp managed to rack up 78,000 unit sales on its first day on shop shelves, which equates to 49% of the shipped stock. Not bad, eh? Please Post Your Comments Below.