The following are known Game Genie Codes for Pengo on SEGA Game Gear.

• Stop Timer and Keep Sno-Bee Eggs Flashing
  00C F9D E6E
• Start With 2 Lives
  020 85F F7E
• Start With 7 Lives
  070 85F F7E
• Start With 9 Lives
  090 85F F7E
• Infinite Lives
  007 3EF 3BE
• Start On Act 10
  0A0 8AF E6E
• Start On Act 20
  130 8AF E6E
• Start On Act 40
  280 8AF E6E
• Start On Act 64
  400 8AF E6E