NEVER insert a flash cart sold on this site (or anywhere for that matter) into a Nintendo 3DS. It will be BRICKED (no longer work, EVER). You have been warned and I am not responsible for damages done to your 3DS. You WILL end up with a fancy paperweight if you choose to disregard this message.
Also - The Flash Cart for the Nintendo DSi and everything below it accepts all MicroSD cards, but the Regular one does NOT. It only accepts non-SDHC cards 2GB or smaller. Just a warning.
To end this, I am not responsible for trouble if any arises for illegally downloading games. These carts are for game developers and home brew applications. DS Game ROMs are legal only if you already own the retail cart.
All that said, please enjoy the product! :)
