My Nephews stole my Gameboys by borrowing them and never returning them. I still got a DS my son owns. But I had the Classic Game Boy, Game Boy translucent case, Color Game Boy yellow shell, Game Boy Advance SP. All gone now. They are collector's items now worth a lot.

I had an Atari Lynx but had to sell it because I needed the money. It was like the Game Boy but Atari and it had color graphics and slim cartridges.

I think Free Pascal or some other language can make console games by cross compiling.

Right now I have a Raspberry PI with RetroPI to play Gameboy games.