Is the sticker of your R4i Gold labelled r4ids dot com (there are many similiar names)? If yes, then it works fine (tested on my XL). Edit: One more thing, the card has to be released after Sep 2009 (I can't remember the exact date and I can't check it as the web site is down). Before that it cannot support 1.4 firmware of the NDSi (the one used by XL).