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

Note: Do not activate any codes until you see the SEGA Logo screen.
• Start A New Game With $5,000 Gold
  A0EA-AAAC
• Start A New Game With $250,000 Gold
  9LEA-AAAC
• Infinite Life (Take No Damage From Most Enemies)
  AM3T-AA4T
• Infinite Life (Different Code)
  9M3T-AADA
  Note: This may cause a few graphical glitches but you cannot die.