Flutter Ponies are one of the other kinds from G1. They're about the size of miniature ponies, so larger than the regular ponies' foals but smaller than the adults. They have diaphanous, magical wings on their backs. One power common to them is Utter Flutter, which is a sparkling wind produced by these wings that is bad news for anything evil. The more of them there are working together, the stronger it is. The toys have a mechanism to make the wings flutter up and down when a button is pressed, hence the name.
