The following are known Game Genie Codes for Tetris 2 on Nintendo Game Boy.

• C98-E9A-081
  No next piece screen is shown
• 10D-649-F71 + 00D-629-081 + 3ED-639-B30
  Blocks come down faster
• 70D-649-F71 + 00D-629-081 + 3ED-639-B30
  Blocks come down much faster
• 20D-649-F71 + 00D-629-081 + 3ED-639-B30
• 00A-4BA-A29
  You can select a Round above 30 on the Options Screen
• FA8-CB8-4C1
  In Versus Mode, no blocks are added to the top of screen