Ingenious modder turns Lego Game Boy into an actual Game Boy that can run real cartridges — new Lego set gets outfitted with custom PCB in less than a day, 3D printing required for future button support

A modder, @natalie_thenerd, quickly transformed the Lego Game Boy into a functional Game Boy that can run real cartridges, not just emulators, using a custom PCB with original Game Boy chips. The project involved replacing Lego components with a smaller screen kit and figuring out how to make the buttons work, which will require a 3D-printed Lego piece. While the Game Boy can accept real Nintendo cartridges, further improvements are planned, with the intention to release files for others to convert their Lego Game Boys. Natalie has a track record of creating innovative tech projects, including a transparent Game Boy.