from analyzing the picture for the battle screen with the full back sprites it may be that the HP bar for the trainer pokemon will be on the bottom of the top screen...
kinda hard to tell since it's not the greatest picture to be looking at for identifying what goes where...
another possibility for the game is that they're making it more realistic...
remember when Ash went to Viridian City in the first or second episode it was huge while the characters in the game went to basically what looked like a village...
so maybe they're making the cities, cities and the towns, towns rather than have villages and towns representing the towns and cities found in the games...
remember in DPPt they increased the size of the icons of the cities and towns so this could be the game that shows them as they're supposed to be but that's just me really...