Please take the following steps:
- Switch off Game Boy Printer.
- Remove the protective cover over the paper roll and cut off several centimetres' length of paper.
- Lift the plastic tab above the paper cutter from below (using your nail or a coin), press lightly with your thumb on the place where you see the word "printer" on the cover, and move the cover in the direction of the paper groove.
- Carefully remove the jammed paper (using your finger or tweezers).