The following are known GameShark Codes for MDK on Sony Playstation (PS1).

• Normal Joker Command
  D00BDBC0 ????
• Infinite Energy
  800CB740 03E7
• Infinite Chain Gun
  800CB80C 00C8
• Infinite Sniper Weapon #2
  800CB810 0063
• Infinite Sniper Granade
  800CB814 0063
• Infinite Sniper Weapon #4
  800CB818 0063
• Infinite Motar Shots
  800CB81C 0063
• Infinite Sniper Weapon #6
  800CB820 0063
• Always Have Worlds’ Smallest Nuke On Pick-Up
  800CB7FC 0001
• Infinite 1st 3 Items
  800CB80C 0009
  800CB770 0009
  800CB794 0004
• Infinite Homing Bullets On Pickup
  800CB810 0007
• Number Of Bombs Never Go Down When Bombing In Jet
  800BDA08 0009
• Population Meter Never Decreases
  D00C3ECA 1A41
  800C3ECA 1A42
  D00C3ED2 1A5D
  800C3ED2 1A5E
• Moon Jump (Press R2 + X)
  D00BDBC0 0042
  800BDF6A FFFF