first you go to the main menu then hit the button that says either adventure log or data or rename team then hit delete data and you can make a new file
Go to exploration record at the main menu and choose delete save data.
well if u are refering to how do u get new dungeons there are many ways one is if u don't want cheats you can always wait until you see a mission labled ??????? that alows you to get a new dungeon or you can go to this link http://www.gamefaqs.com/portable/ds/file/938930/56458 then scrowl all the way o the dugeon section and u can get wonder codes for new dungeons.
if it says saved file failed it means your game(s) are broken, to fix it you need to take it to the Nintendo shop in Edgware. or if your in japan go to singla nathoo (nintendo shop)
you need a special card that can play illegal versions downloaded from internet and you have to find a cracket file and you must have a not that old card to play it (no r4!!)
yes you can
you go to rom-emulator.com/file/downloads/pokemon_mystery_dungeon/zizar0/with-emulator
If a file is corrupted there is nothing you can do..you just delete your game and start over sorry.
You have to progress through the game first, just like the first one. As for Action Replay, I don't know, as the device corrupted my brother's Diamond file, and I didn't use it since.
You normally save on your bed in your house, or you can quicksave in a dungeon by pressing B then going to Othersand Quicksave or Give Up.
What do you mean by "resore"? Do you mean get a save file back? If so, it's impossible to do so.
you start another one. I did that by accident once,so then I had to start over
go to others, and select delete file, you will be asked to confirm your decisions, and if you say yes, you will be asked: are you sure? the deleted file cannot be recovered? Select yes then and the file wil start deleting