Just a bit of updates...pokebeach.com has posted a number of art designs by Ken Sugimori for the new D/P pkmn, which look nice. Check those out.
Also to give you a look at pokemon tracking and how the availablity will vary depending on the time, we have a nice example which doesn't show much but gives you a nice idea of how you can see when certain pkmn are able to be seen. Check it out!