Hello!
So I recently bought a 3DS for myself and remembered how excellent having a flash card for my DS was. So I researched a bit and looked around and there's some 3DS flash cards out there. Is there any that actually play 3DS games? From the looks of it they only play DS and GBA and GBC...
I took a look at the rail and noticed that the two last pins were soldered for some reason, luckly I still had the rail of my broken joycon so after I swapped them I was able to use it attached to the console