Her box backcard unfortunately does not mention specific ponies unfortunately. However the artwork does feature Gem Blossom, Forsythia and a pink pony [I cant remember who it is unfortunately, I can only remember she is at the back of the picture and she is pink...not who she is]. She was also released with bonus ponies at one point - these were 2 of either Rainbow Swirl, Denim Blue, Peachy Pie or Desert Blossom. There was an online game you could play as well which featured Desert Rose, Pinkie, Gem Blossom and Skywishes.
All in there is not too much consistency unfortunately.