Harley's Humongous Adventure Game Genie Codes (USA)
If you are unfamiliar with Game Genie or Pro Action Replay (PAR) cheats and how to use them - fear not! Both of these things are usually found under the Cheat tab if you're playing on an Emulator which is located on the Toolbar at the top of the Emulator's window. If you're playing with an actual physical console you'll need to purchase a physical Game Genie or Pro Action Replay and use the codes that way.
Anyone using an Emulator for SNES has three good options. You can use RetroArch, bsnes or Snes9x, if you'd like to learn more about how to use codes on any of these 3 Emulators follow the links provided. Those pages will go into more detail about how to add and use the codes on my website.
Don't see the code you're looking for on this page? Why not try my Pro Action Replay codes for Harley's Humongous Adventure and see if the code you're looking for is there instead!
Unlimited Lives: C2C8-07B5
Unlimited Ammo: DD87-A4B0
Unlimited Time on Vent Level: 3C83-ADA4
Start with maximum fuel: 6DCF-04B1
This code will work for every level in the game
Level Select Menu: D43E-046F
To bring up the menu after activating the code press 'X' on the Title Screen with the house to bring up the menu.
Start with 11 Lives: FDCF-A7F1
Start with 26 Lives: 49CF-A7F1
Start with 51 Lives: 9DCF-A7F1
Start with 100 Lives: BBCF-A7F1
Start with 4 Hearts: D6CF-ADB1
Start with 5 Hearts: DCCF-ADB1
Protection against hazards: C2C0-0DB5
Only works for some hazards.
Start with 25 ammo for every weapon: 4922-6415
Start with 50 ammo for every weapon: 9D22-6415
Start with 99 ammo for every weapon: BB22-6415
Get 20 Ammo from a weapon power-up: 4D8D-DDB9
Get 30 Ammo from a weapon power-up: 7D8D-DDB9
Get 40 Ammo from a weapon power-up: 0D8D-DDB9
Get 50 Ammo from a weapon power-up: 9D8D-DDB9
60 Seconds on Level 1 to collect power-ups: 7A8C-A704
90 Seconds on Level 1 to collect power-ups: 9C8C-A704
Any Fuel Power-up gives maximum amount: DDC4-6495
Unlimited Jet Fuel: DDCD-6DF5