here is what that blog says (when it comes to new information). for the record, they went to an early showing of the movie, and it seemed to have a new trailer for the game...
"For a moment you can see the battle scene for a new Pokemon called Nezumimi. By the way, is that Chinchilla Pokemon a rodent or a cat? I wouldn't say Nezumimi couldn't possibly be of the same evolutionary line... but then again it was only one instant so I have no idea."
"Last time we saw the roller coaster but in this trailer we also see the Ferris Wheel."
"At the end an unnamed Pokemon is waving to us. It has big eyes and pointed ears. It kind of looked like this --> (drawing). I think a part of the ears were orange, but I forgot how the body looked."
So they are actually saying there was two new Pokemon... Nezumimi who reminded them of Chiraamii but obviously wasn't (since they seem to know what Chiraamii is, clearly) and an unnamed Pokemon with possibly orange pointed ears and big eyes.
(I know I am new here so my translations might not be trusted, I've been hungry for more BW info and looking around various forums to keep me satiated. I've lived in Japan nearly six years, believe my translations (and this blog in general) or not!)