Tony Hawk's Underground Gameshark Codes (USA)
This page contains Gameshark cheat codes for Tony Hawk's Underground (USA). If you're playing on an emulator you can usually input codes very easily by accessing a tab off the top of the toolbar. Anyone playing on a physical Gameboy will need to purchase a physical Gameshark device to use these codes.
If you're using an emulator and still can't figure out how to setup these codes, you're in luck! There's two common emulators for GBA games, the mGBA and VisualBoy Advance. Follow the link provided for the emulator you're using to be taken to a guide explaining how to get these codes working.
Don't see the code you're looking for on this page? Head on over to my Tony Hawk's Underground (USA) CodeBreaker Codes and check for your code there instead!
Unlimited Money: 1200D864 0000FFFF
Have $50,000: 1200D864 0000C350
All Cheats Unlocked: 1200D364 0000FFFF
All Players Unlocked