The following are known Game Genie Codes for Beyond Oasis on SEGA Genesis.

• Master Code – Must Be On
  AABT-AA7R
• Protection From Most Attacks
  RFNA-A6YE
• Start A New Game With 250 HP
  9JKT-AAH4
  9JLA-AAAA
• Start A New Game With 500 HP
  8TKT-ACH4
  8TLA-ACAA
• Start A New Game With 100 Attack (Rank)
  NTLA-AAAR
• Start A New Game With 500 Attack (Rank)
  8TLA-ACAR
• Start A New Game With The Omega Sword
  96KT-ALGT
• Start A New Game With The Metal Bow
  96KT-ATGT
• Start A New Game With The Hyper Bomb
  96KT-A0GT
• Press MODE Instead of A+B+C To Cancel Summon
  NCFT-BNFT
  BCFT-AAF0
• Your SP Doesn’t Decrease With Time (You Don’t Have To Cancel The Summons)
  REPT-C6XL
• Don’t Lose Any SP When You Hold Button A For 1 Second (ie. “Magic Storm”)
  REPT-C6YA
• Almost Invincible
  83NA-AA2G
  Note: You will still lose SP if you tap the A Button.
• Trolls Cannot Catch Ali
  ACXT-CA6T
• Giant Worms Cannot Catch Ali
  AADT-EA30
• Invulnerable to Regular Hits
  AW8T-AAHT
• Invincibility
  MXFT-AAF4
• Weapon Turns Into The Infinite Weapon After Use
  98CT-BE5J
• Infinite Weapons Actually Are Not infinite (Except Knife)
  ALCT-AA5E
• Do Not Lose SP When A Button is Tapped
  REPT-C6VR
• Disable Active Zones
  ALFT-AA4W
  Note: When this code is enabled you cannot leave the current area.
• Walking On The Air
  AGRA-BT3L
  Note: If you press the jump button while you are in the air you will fall down.
• Walking On The Air (Different Code)
  ABPA-AA58
  Note: If you press the jump button while you are in the air you will fall down.
• Additional Effects to the ‘Walking On The Air’ Codes
  ABWA-AA9T
• You Can Jump On The Air
  ABSA-AA6L