They appeared in the the book that came with point dread. I made the Sharella & Cat-Goblins, I bought the shields & the halbeards from DJ force.
The Imperial Guards were chosen by Zodac to protect Point Dread while The Goddess is away during her mission, after he had seen them fight Skeletor's giant mutant ants. Point Dread was created by the same scientists who built Castle Grayskull ages ago before The Great War. Point Dread moves through both time & space. The savage Imperial Guards move with Point Dread and do not age.