Yes, and thats exactly how UK's replay system works. It saves them on the battery inside the cartridge. It might be somekind of RAM too, but usually for all the cartridge games if it has some sort of saving feature it saves on a battery, since its easily replaceable in case it dies.
EDIT: Just remembered another one: Starcraft. Not initially, but they added ability to record and watch replays in patches.
Last edited by TheChosen; 18-09-2012 at 05:42 PM.
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