The Ankylosaurus was one of the smallest pieces in the line.  It had a one-piece attachment that served as both a brain box and a harness that for a giant crossbow rocket. The Ankylosaurus did not have a seat for its rider, Sting. The pre-production photo of the Ankylosaurus depicted a dull orange color but the final production piece was actually dark and light gray. It probably would have looked cooler if the final piece was orange, but the piece was pretty small and ultimately not that cool anyway. The Ankylosaurus would have its name changed to Euoplocephalus when it was re-released as part of the Smithsonian Institution line.