Highlight the designated hitter selection on the options menu and press Square, Circle, Square, Circle. Then, the AL and NL All-Star players will be available after exiting the menu.
Highlight the credits option and press Square, Circle, Square, Circle, Triangle. If you entered the code correctly, the name of the stadium will turn green. Then, start a game to play in a corn field.
| Unlock Field of Dreams Stadium | 8005B09A 0001 |
| Home Team Score Modifier | 8005BEEC ???? 800B0218 ???? |
| Away Team Score Modifier | 8005BEF0 ???? 800B021C ???? |
| Infinite Strikes | 8005B0FC 0000 |
| 1 Strike And You Are Out | D005B0FC 0000 8005B0FC 0002 |
| 2 Strikes And You Are Out | D005B0FC 0000 8005B0FC 0001 |
| Infinite Balls | 8005B100 0000 |
| 1 Ball And You Walk | D005B100 0000 8005B100 0003 |
| 2 Balls And You Walk | D005B100 0000 8005B100 0002 |
| 3 Balls And You Walk | D005B100 0000 8005B100 0001 |
| Infinite Outs | 8005B114 0000 |
| 1 Out And You Are Out | D005B114 0000 8005B114 0002 |
| 2 Outs And You Are Out | D005B114 0000 8005B114 0001 |
