The following are known Game Genie Codes for Xenon 2: Megablast on Nintendo Game Boy.

• FA4-16D-4C1
  Infinite energy
• 013-08F-A22
  Start with very little energy
• 053-08F-A22
  Start with 1/3 energy
• 093-08F-A22
  Start with 1/2 energy
• 002-04F-5D4
  Start with 2,222,222 points
• 011-75C-F7E
  Start with 1 life
• 051-75C-F7E
  Start with 5 lives
• 0A1-75C-F7E
  Start with 10 lives
• FA2-EBF-4C1
  Infinite lives
• 002-F4F-5D4
  When you die you get an awesome ship for a while
• C96-DBC-6EE
  Purchases at the shop are free