Slot 1 on a DS is the slot that you put DS game cards into.

Slot 2 is the [[https://boyboy88.uk|pg slot]] for Game boy [[https://www.cbsnews.com/search/?q=advance%20game|advance game]] paks.(Image: [[https://www.istockphoto.com/photos/class=|https://www.istockphoto.com/photos/class=]])