I also went through to see what effect the 3D Mario and Mario Kart had on the 3DS, as well as the price cut.
3D Mario:
Japan-106% increase
Europe- 62% increase
USA- 35% increase
Mario Kart:
Japan- 77% increase
Europe- 17% increase
America- 34% increase
Price cut:
Japan- 5,146% increase
Europe- 296% increase
America- 301% increase
These games (including Zelda) and price-cuts were well-introduced in order to try and turn the tables with the sales figures. Nintendo seem to be hinting towards a similar (well, identical) scenario for the Wii U, so I don't see why it can't have a similar effect.













