Midnight Moon was SUPPOSED to be like other mares, she was supposed to grow big. Unfotunatly, it turns out she contracted a disorder when she was born, the equine scientists in Cloudsdale nicknamed this as Genetic Growth Disorder, or G.G.D for short. the scientists have found that this disorder literally stops the body from aging during the filly stage of development, thankfully it's ONLY the body that is effected.

This is about her mis-adventures as she begins to explore Ponyville, stuck foal sized.