Moondancer

 Moondancer is a pony that Spike briefly mentioned in the first episode of Season 1. While going into Twilight's home in Canterlot, Spike carries a present that soon accidentally is ripped. The toy inside was a teddy bear. Spike claimed, "it was for Moondancer." As well as being mentioned but not yet seen in My Little Pony: Friendship is Magic, Moondancer is a Generation 3 pony from the past