1. Go to the get ninjhax section of this page and enter your 3DS console’s firmware version.
2. Hit submit; you should get your very own ninjhax QR code.
3. Download the homebrew starter kit and extract it at the root of your SD card. Alternatively, you may choose to only download The Homebrew Launcher menu executable and place it at the root of your SD card. No matter what, after this step, you should have a file named boot.3dsx placed at the root of your SD card.
4. Make sure your 3DS’s wifi connection is enabled and connected to the internet (this is important!).
5. Start CUBIC NINJA on your console, choose “Create”, then “QR code”, and finally “Scan QR code”.
6. Scan the QR Code. This step might take a couple tries; make sure you fill up as much of your 3DS’s screen with the QR code. If scanning the QR code returns to menu with an error, try a few more times.
7. Follow the on screen instructions. You may choose not to install the exploit to your gamecard’s savedata, though doing so is not recommended.
8. OPTIONAL – once the ninjhax is installed to your gamecard, just go back to the “QR code” menu and it’ll run automatically!
9. OPTIONAL – you can now run homebrew apps on your 3DS! Simply drag and drop application folders into the “3ds/” directory that was created on your SD card by ninjhax.