Go to the Features menu, then Extras, where select the Codes item and enter the following codes:
NBA 2K12: Cheat Codes (for uniforms and teams). Free Download
2kchina – 2K China Team
2ksports – 2K Sports Team
nba2k – NBA 2K Team
vcteam – VC Team
agsntrccai – NASCAR Racing uniform
aifnaatccv – Cavs Cavfanatic Uniform
wasshcicsl – Hardwood Classics uniform for teams Cavaliers, Jazz, Magic,
Raptors, Timberwolves, Trail Blazers and Warriors
asrdirmga – Hornets Mardi Gras uniform
eydonscar – Secondary Road uniform for the Grizzlies, Hawks, Mavs and Rockets teams
riiasgerh – St Patrick’s Day uniform for the Bulls, Celtics, Knicks and Raptors teams
ycprtii – Trail Blazers Rip City Uniform
payrespect – ABA ball
23 – Retro Air Jordans sneakers