Pokemon Leaf Green Wild Pokemon Modifier Codes (USA)
This page contains Gameshark cheat codes for Pokemon Leaf Green (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 Pokemon Leaf Green (USA) Gameshark Codes and check for your code there instead!
The codes on this page are used to change what Wild Pokemon you encounter out in the field. I've personally tested many of these codes and can confirm that they work. However, I have a simple cavaet to that. If you're using a version of Pokemon Leaf Green/Leaf Green that is a fan edit/hack then these codes will not work. To learn more about hacked ROMs follow the link provided.
I've personally tested these codes on the VisualBoy Advance with the USA release version of Pokemon Leaf Green 5/17/2018.