If i play a game on a dstt card, will it remember what iamp;#39;ve earned ? -

i m not sure if i play a game and unlock new tracks on racing games mario kart or earn money on games like nintendogs, will i start from scratch when i turn it off, or will i need to leave it on the little card, or is there any way of saving your results etc|::::|when you play nds roms on your dstt everything saves to the micro sd card. so if for any reason you want to take the game out and play it later all you have to do is stick your sd card in your computer and save the .sav file in your documents then you can delete the game and save from your sd card. when you want to play that same game again just drag or copy/paste the file back to your sd card when you put the game back in and everything should be where you left off