The following are known Game Genie Codes for Tennis on Nintendo Game Boy.

• 001-DAD-3BA
  Neither player can score points (You have to switch off this code to score)
• 010-9CD-F76
  1 game needed to win a set
• 020-9CD-F76
  2 games needed to win a set
• 030-9CD-F76
  3 games needed to win a set
• 040-9CD-F76
  4 games needed to win a set
• 011-9AD-E66
  1st point takes you to 40 points
• 021-9AD-E66
  2nd point takes you to 40 points
• 000-99D-3BA + E00-74D-6E5 + E00-7ED-6E5
  Neither player can win the game