The following are known Game Genie Codes for Super Mario Land 2: 6 Golden Coins on Nintendo Game Boy.

• 023-218-E6E
  Each defeated enemy worth 2
• 053-218-E6E
  Each defeated enemy worth 5
• 00D-8DA-E6E
  Stop the Timer
• 02D-8DA-E6E
  Timer counts down by 2 at a time
• 002-41B-F7E
  Start a new game with 1 Life instead of 6
• 092-41B-F7E
  Start a new game with 10 Lives instead of 6
• 242-41B-F7E
  Start a new game with 25 Lives instead of 6
• 492-41B-F7E
  Start a new game with 50 Lives instead of 6
• 742-41B-F7E
  Start a new game with 75 Lives instead of 6
• 992-41B-F7E
  Start a new game with 100 Lives instead of 6
• 001-40C-E6E
  Infinite Lives
• 024-5BC-E6E
  Mushroom turns you into Bunny Mario
• 034-5BC-E6E
  Mushroom turns you into Fire Mario
• FA1-B9C-4C1
  Stay as Super Mario when hit
• FA1-C8C-4C1
  Stay as Fire Mario or Bunny Mario when hit
• 004-BBC-19A
  Hearts are worth nothing
• 004-5F8-2AA
  Play 30 Coin Game of Chance for free
• 004-288-A2B
  Play 50 Coin Game of Chance for free
• 003-F28-E62
  Play 200 Coin Game of Chance for free
• 003-BB8-C4E + 003-BA8-80C
  Play 999 Coin Game of Chance for free
• 01D-92E-E6A + 019-2BA-E6A
  Each coin is worth 101
• 009-22A-19A + 00D-89E-19A
  Each coin is worth 0