Are the game saves stored on the game cart, the internal memory or the SD card?
Because StreetPass allows you to exchange you game data with other people, even if you don't have that game in your 3DS at the time, but every cartridge based console and handheld has built in memory designed for save data.
Because StreetPass allows you to exchange you game data with other people, even if you don't have that game in your 3DS at the time, but every cartridge based console and handheld has built in memory designed for save data.