From My Little Wiki
This pose is pacing which is when both feet on one side move at the same time. This is unnatural for a real pony but they can be trained to do this.
Ponies in the Quackers Pose
Ponies who appeared in this pose during their prototype stage in catalogs/pamphlets, but were not produced and sold in this pose.
Bunny Hop (prototype)
Tuneful (prototype only)
Diamond Dreams Pose
The Quackers Pose with a moulded saddle.
List of Ponies in the Diamond Dreams Pose