here's what a m3 team member said, translated thru google
"M3DS Real run-time does not modify any part of ROM, but from the Wii download data from the host, to re-download the data will cover the past NDS data in memory, as downloaded from the Wii console will not support the program and burn cards from read data, it was a result of such problems."
"M3DS Real run-time does not modify any part of ROM, but from the Wii download data from the host, to re-download the data will cover the past NDS data in memory, as downloaded from the Wii console will not support the program and burn cards from read data, it was a result of such problems."