I was playing platinum on my 3DSXL and all of a sudden it turned to a black screen like I turned it off. game or system? I also had it happen with the original Pokemon ranger game
You cant be to sure on that one, it could be either one.
That must mean the games are broken. You've played them too much. Or the fact your 3DSXL has a bug or glitch. Cant tell for certain.