Input these codes at the extras menu to unlock the corresponding sneakers.
|FE454DFJCC||Duncan All Star|
|23DN1PPOG4||Gil Zero All Star|
|ADGILLIT0B8||TS Lightswitch (Away)|
|ADGILLIT2BA||TS Lightswitch (Home)|
Flick the Wiimote back and forward like you would if you were in the 3 point contest. It might not always go in but there should be an increase in the amount that do.