The following are known Game Genie Codes for The Legend of Zelda: Link’s Awakening on Nintendo Game Boy.

• FAO-999-4C1
  Infinite energy
• 09C-56B-E6E + 09C-74A-E6E
  All items you get start at max power (When you get an item, you must have a space open (either A or B)
• 054-EE9-E6E
  Get 5 rupees for each single rupee
• 324-EE9-E6E
  Get 50 rupees for each single rupee
• FF4-EE9-E6E
  Get 255 rupees for each single rupee
• FAF-BDA-4C1 + FAF-B2A-4C1
  Infinite rupees (Rupees are not deducted when used for purchases you can afford.)