This deckbox fits 60 sleeved Pokemon cards. The first card is visable through the Gameboy screen.

Push the buttons in their correct possition. The start and select buttons require some patience, I reccomend using a flat object like a butter knife to push them in.
Connect the hinges from the lid to the case. Do not use too much force, the pieces are delicate and can break. If you use minimal force, but apply it consistently the hinges will connect..