Harley's Humongous Adventure Pro Action Replay 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.
Those of you out there who are playing on an SNES Emulator that need help figuring out how to use the codes on this page should visit my how to setup Game Genie and PAR codes for SNES guide. That guide will go into a lot of detail about how to setup and use the codes you find on these pages and some trouble shooting tips for those who need them.
Don't see the code you're looking for on this page? Why not try my Game Genie codes for Harley's Humongous Adventure and see if the code you're looking for is there instead!
Unlimited Lives: 05ADBEAD
Unlimited Ammo: 05B33A00
Unlimited Time on Vent Level: 00BBE3EA
Start with maximum fuel: 05A91A80
This code will work for every level in the game
Level Select Menu: 00E5FA02
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: 05AB1C10
Start with 26 Lives: 05AB1C25
Start with 51 Lives: 05AB1C50
Start with 100 Lives: 05AB1C99
Start with 4 Hearts: 05AB1208
Start with 5 Hearts: 05AB120A
Protection against hazards: 05AD42AD
Only works for some hazards.
Start with 25 ammo for every weapon: 09DED925
Start with 50 ammo for every weapon: 09DED950
Start with 100 ammo for every weapon: 09DED999
Get 20 Ammo from a weapon power-up: 05B40220
Get 30 Ammo from a weapon power-up: 05B40230
Get 40 Ammo from a weapon power-up: 05B40240
Get 50 Ammo from a weapon power-up: 05B40250
60 Seconds on Level 1 to collect power-ups: 00BBAD3C
90 Seconds on Level 1 to collect power-ups: 00BBAD5A
Any Fuel Power up gives maximum amount: 05AE2900
Unlimited Jet Fuel: 05AE0000