R4 DS Cards are by far the most affordable type of gaming for the Nintendo DS. Unfortunately, several stores in America has been banned from game stores due to illegal gaming. One is still capable of ordering the game card online for 10 to 40 dollars and maybe even cheaper depending on how big you want your SD memory to be. R4 and other game cards such as the M3 and N5 are very convenient especially since downloading roms for games off of the internet are free. R4 has made game cards for the Nintendo DS but unfortunately when the DSI came out R4s did not work on the system. However, R4 and other game cards were able to make new game cards to work for the DSI. Pirated game cards do not only get you free Nintendo DS games, but getting the correct downloads and roms will enable you to play GBA (Game Boy Advance) and GBC (Game Boy Color) games. To download games onto your game card, you insert your SD card into your computer using an adapter, then you download a file converter such as WinRAR. You then open your internet browser and search the game you want and after the name of your game, type in rom or game download, ie: Pokemon Diamond rom, Pokemon Diamond game download. I hope the information in this post is helpful and I hope you enjoy your game!