This is not fake. This only works with .NDS rom files. 3DS roms DO NOT work as of this video. It will happen though.
I am on 3.0.0-6U OFW. The Supercard DSTWO is one of a few that are known to work on the 3DS AND on this newest firmware.
As far as I know, you can't change the aspect ratio on the .nds rom files to fit the wider screen. I have found no option for that.
I bought it here:
http://www.r4ds-ds.com/products/Supercard-DSTWO-Card-for-Nintendo-DS-DS-Lite-...
They do accept Paypal but you have to contact them to send you an invoice through your email so you can pay them that way. Ships from China.
I know that this isn't new info to some of you but not everyone knows that there are nds cards compatible with the 3DS and on the newest firmware of the 3DS.
ndsgamer.com ships from texas
areli1994 4 days ago