I remember when Binacle was leaked and 100% thought it was fake. It's still not a design I love, but at least Barbaracle turned out to be pretty whimsically badass.
I sort of was sad to find out that the little fish pokemon were all fake. Moreover I was sad to find out that the braixen evolution was fake. I mean, that witch design would be amazing! (Hopefully someday she gets a mega witch design, even though she is supposed to be an oracle.)
I was glad the weird caped figure was fake, and thought it looked pretty fake. The little water-type on the left-middle looked obviously fake because of the flat pose.
Honestly, I though Greninja was real and instantly loved the design. Again, too bad Delphox didn't look like the bottom right design :(
As with XY, I expect that the games will be released in Austrailia, Japan, and Korea first. Since they are the first timezone to reach the 18th of Nov. At least the fakes help give some mystery if I cannot resist the temptation to get spoiled. (I'm sure someone out there is making fakes just for this occasion.)