Instructions
Navigate your web browser to the "PKMDB - Event Downloads" page.
Download any desired Wonder Card files. The Wonder Card files can be downloaded by clicking on the envelope icon next to each listing.
Extract the contents of the Wonder Card data to your local hard drive.
Navigate your web browser to the "Pokesav" download page.
Download the Pokesav installation file.
Run the completed installation file, and install Pokesav to your local hard drive. Follow the on-screen instructions to finish the installation process.
Open Pokesav.
Click on "File" in the program toolbar, then select "Open."
Locate the desired Wonder Card data using the file browser. Click "OK" to load the Wonder Card data.
Click "File" from the program toolbar, then select "Save as." Click on the drop-down toolbar labeled "File Type" and select the second option on the list. Enter a name for your file, then click "OK" to save it.
Remove the micro SD card from your cheating device or flash card and connect it to your computer. You can use a USB-to-micro SD converter if your computer does not have a micro SD slot.
Drag the pokesav file you created in Step 10 into the root directory of the micro SD card.
Insert the micro SD card into your cheating device or flash card.
Load your Pokemon saved data through your flash card or cheating device. Select "Mystery Gift" from the main menu. Wait for a few seconds, and you should receive a data transfer with the Wonder Card data.