The Game Boy Micro still contained a useable SM83 and GBC PPU on the SoC, but the cartridge is inaccessible. In theory you might be able to run a tiny payload f

The Game Boy Micro still contained a useable SM83 and GBC PPU on the SoC, but the cartridge is inaccessible. In theory you might be able to run a tiny payload from WRAM (32KB?) but it's pretty useless otherwise. https://github.com/AntonioND/gba-switch-to-gbc https://github.com/AntonioND/gba-switch-to-gbc