When you've been playing really well in My Player mode, Jordan Brand will give you your own shoes just like in NBA 2k11. For these shoes, you choose the attribute that the shoe will boost. When you get the letter for this, save before anything else. Go back to the letter and make your shoe, pick an attribute and finish. Once it says that it's saving the shoe to NikeID, wait until it's done and exit My Player. When you come back, the letter should appear again because that's where you saved. Keep doing the same thing over and over but with different attributes. Check your "My Shoes" and all the shoes should be there.
When you've been playing really well in My Player mode, Jordan Brand will give you your own shoes just like in NBA 2k11. For these shoes, you choose the attribute that the shoe will boost. When you get the letter for this, save before anything else. Go back to the letter and make your shoe, pick an attribute and finish. Once it says that it's saving the shoe to NikeID, wait until it's done and exit My Player. When you come back, the letter should appear again because that's where you saved. K...
Enter the following passwords in the Codes menu (under "Features") for the desired effect.