The following are known Action Replay Codes for NBA 2K on SEGA Dreamcast (Dreamcast). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark

1st team score is 200
FB99B0AF
000000C8

1st team score is 0
FB99B0AF
00000000

2nd team score is 200
2A67456C
000000C8

2nd team score is 0
2A67456C
00000000