This beautiful modded Game Boy Camera fits entirely inside a cartridge - The Verge

And it uses an iPhone lens.

The Super Retro Boy is a great remake of the original Game Boy - The Verge

Someone modded a Game Boy Color to act as a much better Apple TV remote - The Verge

Nintendo 3DS - Wikipedia

did the GameBoy Camera lens mod (totally worth it) : r/Gameboy

I modded a GBA for the Game Boy Camera cart : r/Gameboy

Game Boy Camera 2.0 Is Here Thanks To A Talented Modder

Hacked GAMEBOY CAMERA takes Amazing Pictures of the Moon and Bugs

You can now build your own awesome Game Boy Mini Camera - The Verge

Bringing The Game Boy Camera Into The 21st Century

How to Hack a Game Boy Camera to Use 'Real' Camera Lenses