Hello, now I've recently received the "Super Mario Bros. 25th Anniversary" DSiXL as a gift... I am a former owner of the DSi and I have the Acekard2i. The Acekard worked perfect with the DSi and ever since I got the DSiXL it gives me the infamous "Error has occurred. please shut off blah blah blah." I've done a ridiculous amount of research, downloaded the latest updates and did that stupid Danny Phantom thing. I seriously have no idea what to do. Oh! And if it helps my DSiXL Version, er whatever, is 1.4.1U.
Koolio. It should work with the update. You have to update it on a DS Phat/Lite/DSi-pre 1.4.1. And Minecraft is AMAZING! Just started making my second story to that glass house. I'll switch out my sig in a few.