hey guys, new here.
listen, if you really, really need to use the cheats, here's how i do it.
first, you need to fit BOTH the patched rom and the original on your card. that's how i do it. (since the original uses J to denote japanese, i put U for, well, US, haha.)
EDIT: since the patcher renames the rom, rename it so that the only difference between the 2 roms are the file size and the letters J/U in the file name (ie, original might be RODS J, patched would RODS U)
then you need a brew that can RENAME files (i use the ever-so-useful DSOrganize, but you can use iFile as well) so that you can rename the save files. now, just browse the files using your preferred RENAMER, and rename the save file from J to U. then you load the ORIGINAL rom (not the patched, it'll create a save which will only confuse you. remember, 2 roms, 1 save. easy), select the cheats (for those with cheat engines, or have it prepatched with cheats), play the game, save. make sure it's done writing. just to be safe, exit the menu, haha. okay, then you reboot.
load up your preferred renamer, then switch it back from J to U. after that, load up the patched rom and enjoy.
Oh, another tip. if you're using DSOrganize, why not create a folder where you can copy paste saves before doing anything rash in-game, or when testing new patches? this way, you'll have backups of your save files. you'll even be able to backup SUSPEND saves (so yeah, if you really wanted that boss to drop something w/out starting all the way back from Geffen...).
i use this method very often, whenever i get annoyed with refining, haha. didn't try any other cheat, didn't wanna spoil the game too much.
EDIT: oh and, i hope they've fixed the Quest info. my last patch was early January, i think, and i was having problems with the quests displaying the wrong info (LIKE "Golden Eagle Reforming?" displaying "Let's take Sierra to Freya's Altar."). and there was one crash-inducing quest. IIRC, it was on that page with the "Demon Birds" or something like that. the PecoPeco in prontera quest. can't remember. maybe next post i'll put more info. and sometimes, using Fly Wing from the menu crashes the game for me, so i had to shortcut it just to be safe. and even then, when i'm grinding for cash and XP, i suspend and backup my save, just in case the shortcut crashes.
flashcart is EDGE, latest OS (1.43).
i can't remember which quests i have left undone, but mostly that quest info problem i've had persisted even after i've finished the main quest. basically, i can view any page in there but that one page (which i'll add in a jiffy. just not now, don't have my DS with me).
there, haha, said my fill. whew. and yes, next time i'll use the format for bug reports. just finished reading that.