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

• AEPA-AAGA
  Start with 1 life
• AYPA-AAGA
  Start with 5 lives
• A6PA-AAGA
  Start with 7 lives
• BEPA-AAGA
  Start with 9 lives
• AEJA-AAHG
  1 life after continue
• AYJA-AAHG
  5 lives after continue
• A6JA-AAHG
  7 lives after continue
• BEJA-AAHG
  9 lives after continue
• AT5A-AA3E
  Infinite lives
• BTCT-AA5G
  Almost infinite energy
• AEPA-AAGJ
  Start with 1 credit
• AYPA-AAGJ
  Start with 5 credits
• A6PA-AAGJ
  Start with 7 credits
• BEPA-AAGJ
  Start with 9 credits
• ATHT-AA8R
  Infinite credits
• SE3T-BJWA
  Sword heats up faster
• SE3T-BAWA
  Sword heats up much faster
• AT3T-AA5C + AT3T-AA3C
  Once the sword is fully heated up, it stays at full energy
• SG9A-BT1G
  Each speed-up item worth 2
• AJPA-AA44 + AEPA-BA42
  Start at chapter 2
• AJPA-AA44 + AJPA-BA42
  Start at chapter 3
• AJPA-AA44 + ANPA-BA42
  Start at chapter 4
• AJPA-AA44 + ATPA-BA42
  Start at chapter 5
• AJPA-AA44 + AYPA-BA42
  Start at chapter 6
• AJPA-AA44 + A2PA-BA42
  Start at chapter 7