Well that seems to have worked! Guess I'll keep this version around. Version 4 of the tool (linked here http://gbatemp.net/threads/the-supercard-dstwo-beginners-guide-how-to-setup-the-dstwo.290190/) didn't work for me. Thanks a ton, Rydian.
I did before, but I think it was a different version of the tool. Trying again now.
UPDATE: Got the message that "Flash Erase" wasn't supported by the device. But it did seem to format the card otherwise.
Hey folks, not sure if this is the right place to post, but hopefully someone can help me out. I got a DSTWO and followed the gbatemp guide to setting it up. I've got a 32gb card and a 3DS. I installed nesDS (1.3a) and it ran fine. Then I exited and later tried to run it again, but all I got was...