The following are known GameShark Codes for VR Baseball 99 on Sony Playstation (PS1).
These codes were also known as Action Replay Codes and in most cases will work on both devices.

These codes are for the U.S. version of the game.

• Away Team Scores 0
  8007990C 0000
• Away Team Scores 50
  8007990C 0032
• Home Team Scores 0
  80079908 0000
• Home Team Scores 50
  80079908 0032