The following are known Action Replay Codes for Super Tetris 3 on Super Nintendo (SNES).

These codes are for the Japanese version of the game.

• Tetris Piece Modifier (Tetris)
  7E1516??
  Note: Starting with 00 is the 1st Tetris piece.
• Tetris Piece Modifier (Magicaliss/Sparkliss)
  7E1542??
• Stage Select (Sparkliss)
  7E1500??
• Set Max. Score (Tetris)
  7E150C7F
  7E150D96
  7E150E98