During Chapter 4: Safe Haven, we meet some unique, new Critters we've never seen before. These guys are known as the Nightmare Critters, and they're essentially the doppelgangers of the original crew.

The chaos in Nightmare Playcare erupts when Simon Smoke loses control, ... Rabie Baby, and Simon team up to rebel against their circumstances, intending to overthrow the Smiling Critters.

But it may well be that the ingenious machinery produced by billions of years of evolution may be better in some situations than artificial skin (also very much in development) or simpler surfaces.