I bought the nice $9.00 one for my brothers DSi. It's the one recommended, it's not a clone. It works with WoodR4. It's legit. Sometimes it doesn't work on his DSi, so we blow on the cart and it works fine. Also, if we plug it into his DS Phat it shows up and works PERFECT every time. Now, it won't work on EITHER console... Even after blowing dust off? Help? I have the 2.0 version.