Select "Options" at the main menu, then "Codes". Select the "Enter Code" option, then enter one of the following passwords to activate the corresponding cheat function.

2K Sports team
Enter 2ksports as a password.

2K Sports China team
Enter 2kchina as a password.

ABA ball
Enter payrespect as a password.

Alternate jerseys
Enter classicthreads as a password.

NBA 2K Development team
Enter nba2k as a password.

Visual Concepts team
Enter vcteam as a password.