Okay, here's my dilemma.. I've had a working DSi flash card for the last while, but it broke. Since then, I have gotten a 3DS. For Christmas my girlfriend bought me one she found online, and was garaunteed by the seller that is is 3DS compatible. I figured I'd might as well as here before I send it back.. Is this able to be used with 3DS? If it can, will it only be able to play DS games, not 3DS games? Please help.