I’m planning on taking the ds lite gameboy advance reader and making a gameboy micro type handheld. But a little larger. Not quite sure about any more details yet.
thats whats called a DMG103, I have build a ton of those myself
I build them with modded ds lite motherboard, so with a macro mod you can play with one screen.
also solder a flashcard to the ds card slot so i can play roms etc