No, it's possible.
What you have to do is order blank NFC tags, and use a program to input the character's data to the NFC tag, then, you can print up a fake card around it (the image) and just glue it together. My friend and I have been doing this to get the cards we don't have.
And it's not...
What they did, was transfer Chief's Amiibo Data to a blank NFC tag, then, they probably printed out the E-reader front/back images and put it all together.
It's not all that hard to do, you just gotta find the data and programs, and, well, have something that can transfer data to a blank NFC...