New Gray Pokemon Spotted in Latest X/Y Trailer?

A new English X and Y trailer is currently airing on Cartoon Network and has been uploaded to Nintendo’s YouTube channel, as you can see below. It seems this slipped by almost everyone, but at 0:08 for about three frames, there appears to be two of a new Pokemon inside an enclosure. They appear to have gray bodies. We of course cannot tell for sure what they are, but they do not appear to match any known Pokemon or overworld object. Thanks goes to Gin for spotting this!