it saves the data if that's what you're referring to, I used to be able to play mine but the cartridge is dead as the CMOS battery went out. It needs a new one, if you do get this, beware as the battery might have depleated from the years this person may have had it. I've had mine for 12 years and it went out about 2-3 years ago, I'm currently playing a more modern version on DS called SoulSilver, it's quite the same but also different. I advise you to get a CMOS battery with solder tabs if you really want this.