The sky3ds flashcart allows users to play 3DS game files from an SD card on a 3DS or 2DS console. It supports all 3DS system versions and regions, works like a real game card with saving and online play functionality, and can hold up to 10 games at a time on microSD cards up to 64GB in size. The sky3ds card allows playing 3DS games on the latest firmware versions and all regions by functioning as a real game card for saving, loading, and online play.