Maybe your DSTwo spring is on its way out, or the Supercard itself isn't sitting right in the DS. My spring's completely dead and requires sticky tape to hold the SD card in place now, but there was a time when it'd seem like everything was fine, but I'd still get those same errors every now and...
I am trying to hack Fire Emblem Warriors on my 2DS XL, I have been trying to get it to work, but I need some extra help figuring it out. I have HEX codes, and a possibly outdated plugin, but I dont know how to implement them