The following are known Action Replay Codes for Columns 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

These codes may only work on the REV 00 version of the game.
• Infinite Time To Choose Level of Difficulty
  FFC853:09
  FFC854:09
• Jewels Modifier P1
  FFC827:XX
  FFC82B:XX