Okay, two things to say here.
1. Not a good idea. I mean seriously, show the fakes, and say their fakes. Don't show the fakes and act like they are real, trying to get people to believe them. That isn't correct at all. These are GREAT fakes, but I feel people would have maybe complimented them more if they knew they were fakes.
2. So what if people know Cascade made them. Nobody is going to send bad emails to Cascade. A simple, this was made by Cascade, and a message from Cascade like, "Yeah, I made these fake things." and maybe a picture of the pokemon without the background would have been enough. Nobody would have eaten alive Cascade. And because nobody posted the creator's name, or statements from the real creator, this evolved into a big incident where people really thought they were real, and it was WPM all by his lonesome trying to prove they weren't.
I feel bad for WPM, but like I said, a simple statement from Cascade, a simple picture from Cascade with proof that they were fake would have solved everything. Heck, I would have believed it if WPM and 1 other person would have said that Cascade made them, without the picture proof.
Let's not try that again, please?