The following are known Action Replay Codes for Baseball Stars II on Nintendo Entertainment System (NES).

The codes will work with the region specified but may work for other regions as well.

• P1 High Score
  0498:FF
• P2/CPU Never Scores
  0499:00
• Most Players Cost Only $3000
  0569:00
  056A:00
  056B:00
  056C:00
  056D:00
  056E:00
  056F:00
• Strikes Modifier
  0494:XX
• Balls Modifier
  0495:XX
• Outs Modifier
  0496:XX

Player Attribute Codes

The game has been programmed to use some of the following memory addresses twice. This means you cannot leave these codes on if you wish to purchase players. Therefore, it is mandatory that you turn these attribute codes off if you want to use the ‘Most Players Only Cost $3000’ code!
• Infinite Player Attribute Points
  0560:63
• Maxed Out Hitting
  056A:63
• Batting
  056B:63
• Running
  056C:63
• Defense
  056D:63
• Luck
  056E:63
• Prestige
  056F:63