I don't see Pokemon Rumble doing much for 3DS sales unless it is a great fully fleshed out title but I see it as being a cheap knock off gaiden thing. Mario Kart and SML3DS are more limited by install base. Even if they manage to double install base to 7 million by late November with an 80% percent attach rate we still have abysmal sales for those series. They may make it to 1.5* levels of sales of their Gamecube iterations.