The Pearlized 3' Twilight Sparkle, Fluttershy, Pinkie Pie, Applejack, a Rarity (if they made one), and Starlight Glimmer.
Also though I do not like the new models of the g4 pony the new rarity runway playset with the changing clothing is not too bad so I would not mind that one item.
Other biggy would be EQG Roller durby Rarity and Midnight sparkle.
These my seem easy to find but I tell you people of the board I live in the middle of no where down the road from Courage the Cowardly Dogs House and we never get any of this stuff at our walmart till months and months later.