Thanks,

...AND PUT IT THE WRONG WAY IN. And to make matters worse, I spent the night at my friends' house, WHO HAD A 3DS. I went home the next day, and my mom took it out. Now my SD card is jacked.

Oh. I see the problem now. I asked for the Pokémon 20th anniversary edition 3DS. But it came out in February, and on Ebay it's 250$, ya know? I had ONE 3DS, Before. Got it in 2011, for my birthday. Then.... Four years later..... Somewhere in August of 2015. I was being stupid, by fiddling with the SD card. It fell out, so I thought I could just put it back in. Ididn't look at it RIGHT...