Hello, I've been using these forums for information often but I've never made an account; But today something good happened to me. On Christmas I got a DSi XL (obviously firmware 1.4.1U). I was very glad but then I remembered that the M3 Zero GMP-Z003 that I got a few days earlier probably wouldn't work on it, and it didn't. Now it sucked badly because I would have to be forced to abandon my Christmas present and turn to my sisters DSL again. But today my mom wanted to check out the DSi XL I got and she went on chat and chatted with my sister on hers. Oddly enough after she gave it back I went back to the main menu and I see Alex Rider Stormbreaker (I forgot the card was still in it from when I tried it last). I seriously almost went crazy, and I'm glad it works 24/7 now. I'm just confirming that I've got a M3 Zero GMP-Z003 than runs on DSi XL 1.4.1U (although it was odd how it began all of a sudden).