[Ultimate PKMN Trainer Red]

On the trailer, I saw a scene of a wild Pikachu appearing, so I think you can catch him in the wild...yeah. I think Gen 6 will not have many new PKMNs, just like johto. The only new PKMNs we know right now is Fennekin, Chespin and Froakie. So I think some PKMN of all the regions will be catchable in the tall grass.