The following are known Game Genie Codes for AAAHH!! Real Monsters on SEGA Genesis.

• Start With 1 Life
  AD5T-AAAE
• Start With 5 Lives
  AX5T-AAAE
• Start With 10 Lives
  BH5T-AAAE
• Infinite Lives
  ACFA-AACC
• Start With Very Little Energy After 1st Life
  AGFA-AACG
• Start With 1/2 Energy After 1st Life
  AWFA-AACG
• Start With 3/4 Energy After 1st Life
  A8FA-AACG
• Start With Very Little Energy On 1st Life
  AF5T-AAAA
• Start With 1/2 Energy On 1st Life
  AV5T-AAAA
• Start With 3/4 Energy On 1st Life
  A75T-AAAA
• Infinite Special Screams
  AAVT-AAGT
• Books Worth Nothing
  ACWA-CAEG
• Infinite Garbage
  AAVA-AACA
• Garbage Worth Nothing
  ACMT-CAGA
• Garbage Worth 20
  CWMT-CAGA
• Garbage Worth 50
  GLMT-CAGA
• Garbage Worth 99
  NRMT-CAGA
• Bugs Aren’t Worth Anything
  AANA-CAA0
• Infinite Energy
  ADBA-AADJ