For some reason, this game doesn't save properly when used with the EZ-Flash IV. I'm using what I believe to be the v1.720 kernel. I've read that EZ-IV had trouble with games that had 128Kb save files and that I should use 8.3 filenames. However, Pokemon Ruby saved just fine with the long filename. Edit: I have found the solution to the problem. The problem is that the EZ-Flash IV has trouble with files that are longer than 45 characters in name. So if any of you guys have problems with that game, just rename it to "Super Mario Bros. 3 (U).gba" and it should work.