You can also perhaps provide an alternative method (which would be a lot shorter to explain then the old xorpad method) by using rxTools to decrypt the rom instead, then extract everything with CTRTool/3DSExplorer. The resulting files will already be decrypted and if ran on 7.x or newer sysnand, the key slot bin file won't be needed.What is the best GBA emulator on Windows currently?
mGBA is arguably one of the best GBA emulator for PC. It features a user-friendly UI and is extremely stable in its emulation. The emulator supports all GBA ROMs and is regularly updated to steadily fix any bugs. Some of its notable features are: Quick key shortcuts for saving and loading game states.