I dont know what G3 ponies are under appreciated or not, but the one that I just absolutely love, is Spring Parade !
I dont even remember where I got her, maybe she was tucked into a bait lot I hadnt sorted through right away, or maybe I found her in a thrift bag, I really cant remember now. But I do remember that one day, I was sorting through a massive bin of baits, and I found her. Shes not even a bait quality pony lol. I dont really like orange ponies, or even really like the color orange that much. but I dunno I adore her, I hardly ever remember her name so I just call her wild flower.