I have an R4i 3DS gold (r4ids.cn) that I have been using on my DS Lite for a while. I figured I'd give it a shot on my 3DS because apparently it should work. I finally got around to updating my firmware to Wood 1.64 and patched the card for 3DS 6.2, but when I try to enter it on my 3DS, I just get a "An Error has occurred. Please press and hold the power button and see the owner's manual". I tried this on my 8.2 fw 3DS XL and my 9.2 3DS with the same results. It still works totally fine on my DS Lite. I have another of the same exact flashcart, but that one did not want to do the 6.2 update (Cart: FAIL). It gets the same error message on the 3DS, but I didn't think that it would have different results regardless.