Requirements:
- GBxCart RW (RW v1.4 Pro is being used for this tutorial).
- FlashGBX software (Windows / Linux/macOS).
- Compatible GB/GBA flash cartridge (see here).
- Download the latest version of the FlashGBX software for your operating system; the...
Source: https://gbatemp.net/threads/how-to-prog ... rw.622241/