Codes 1 through 14: Arcade mode
1. EMVA-AA9W - Player 1 has infinite time
2. EMVT-AA3A - Player 2 has infinite time
3. CWNA-BYVT - Player 1 has 90 seconds
4. CWNA-B2KT - Player 1 has 60 seconds
5. CWNA-BEKT - Player 1 has 50 seconds
6. CWNA-A4KT - Player 1 has 45 seconds
Codes 7 through 14: Ignore counter
7. CWNA-AGKT - Player 1 has 35 seconds
8. CWNA-B6BT - Player 1 has 30 seconds
9. CWNT-BYVW - Player 2 has 90 seconds
10. CWNT-B2KW - Player 2 has 60 seconds
11. CWNT-BEKW - Player 2 has 50 seconds
12. CWNT-A4KW - Player 2 has 45 seconds
13. CWNT-AGKW - Player 2 has 35 seconds
14. CWNT-B6BW - Player 2 has 30 seconds
Codes 15 and 16 cause slight graphic errors
15. HWHA-AAA0 - Select up to +60 seconds in the options screen, keep pushing right on D-pad
16. 2WHA-AABN - Select up to -60 seconds in the options screen, keep pushing left on D-pad