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I was looking at this similar project yesterday: https://github.com/mofosyne/arduino-gameboy-printer-emulator

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Yes! This works great, I used it recently. Also notable: there's this custom ROM project for the gameboy camera (requires a custom PCB) https://github.com/HerrZatacke/2bit-pxlr-studio

I also finally finished Pokemon Gen 1 recently, by using one Gameboy and the two original cartridges, in combination with an arduino to trade between them: https://github.com/pepijndevos/arduino-boy