In NBA 2K11 for the PS3, PS2, PSP, PC, Xbox 360, and Wii, there are several things you can unlock with some cheat codes.
To get to the cheats menu, go to the Main Menu and go to Features, then Extras, then select Codes. Type in the following codes to unlock them.
Cheat codes for the PS3, Xbox 360, Wii, and PC:
2K China Team – 2kchina
2K Sports Team – 2ksports
ABA Ball – payrespect
MJ: Creating a Legend – icanbe23
NBA 2K Development Team – nba2k
Visual Concepts Team (aka VC Squad) – vcteam
Cheat codes for the PS2, and PSP:
2K China Team – 2kchina
2K Sports Team – 2ksports
ABA Ball – payrespect
Bobcats Nascar Racing Uniform – agsntrccai
Cavaliers Cavfanatic Uniform – aifnaatccv
Hardwood Classics Uniform (for Cavaliers, Jazz, Magic, Raptors, Timberwolves, Trail Blazers, and Warriors) – wasshcicsl
Hornets Mardi Gras Uniform – asrdirmga
Secondary Road Uniform (for Grizzlies, Hawks, Mavericks, and Rockets) – eydonscar
St. Patrick’s Day Uniform (for Bulls, Celtics, Knicks, and Raptors) – riiasgerh
Trail Blazers Rip City Uniform – ycprtii