The following are known Action Replay Codes for HardBall! on SEGA Genesis / Mega Drive (Genesis).

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

Device Compatibility: Action Replay

• Balls Modifier
  FFFF25:XX
• Strikes Modifier
  FFFF27:XX
• Outs Modifier
  FFFF29:XX
• Batter Stance Modifier
  FFFF21:XX

  00 – Facing Left
  02 – Facing Right
  04 – Invisible