These codes have an expiration date, so use them quickly! Regularly checking back here or watching the show is recommended.

Go to "Options/Features." Scroll all the way to the right until you see "Locker Codes."
1) Type in "IWATCHEDNBA2KTV." You will receive your first 1,000 VC to use on NBA2K15.
This code was obtained by watching the first episode of NBA 2KTV. Highly recommend watching the following episodes as some nice goodies may be there.

2) Type in "HEYGUYS." You will receive a random item.
This code was obtained by watching the second episode of NBA 2KTV.

3) Type in "PARKSWAG." You will receive 500 VC.
This code was obtained by watching the third episode of NBA 2KTV.

4) Type in "MYSTERY." You will receive a random "MyPLAYER animation package."
This code was obtained by watching the fourth episode of NBA 2KTV.

5) Type in "KEEPTHECHANGE." You will receive random VC.
This code was obtained by watching the fifth episode of NBA 2KTV.

6) N/A.
Ther is no code to obtain for the sixth episode of NBA 2KTV.

Feel free to post what you received in the comments below.