Who's That Pony?

Got a MLP colouring book for my kids Birthday, there are 2 Pony's per page. Twilight's with Sunset, Applejack with Fluttershy, Pinkie with Bon Bon (Special agent Sweety Drops), Rarity with Spike, the CMC's together, Luna by herself, then Rainbow with this Random Pony. This picture is the instructions page so I'm guessing that's her normal colours but I have no clue who it is!