This is pretty much what I thought. It would suggest it could have 2 or maybe more activations of a specific berry or set of berries. Rodents usually store food for later in their pouches, so it would make sense. What would be better is if the first berry was eaten at say 75% and then the second at 25% (or that berry's normal activation point). It would be nice to be able to have two pinch berries, but it might be a nightmare in order to activate them both. Either that or this ability allows this Pokemon to have 2 (or more) Hold Items... Which may be pretty broken on them, but chances are they will be low tiered anyway.
In terms of the mega formes... I am slightly more sold on them now that they only seem to exist in battle with that item equipped. I wonder if it will be a last man standing type of thing where they go into Mega Mode if they are the only Pokemon left on your side of the field. That would be pretty cool but also kinda lame lol. I don't overly like any of the designs though. OH I KNOW LETS PUT MORE HAIR ON THEM. Imo its just lazy when they could of done more.
Also: Ten pages in 12 hours... Jeez D: