The Stone Warriors come from Dimension X, but are not naturally occurring creatures. As noted in "Michelangelo's Birthday", Rock Soldiers were created by Krang through use of his mutagen on rocks, a rare example of a non-living creature being animated by the chemical - and raised as soldiers for his army. They are incredibly strong and resistant to physical injury, but not terribly bright. Accordingly, the Stone Warriors entire "culture" is geared towards military doctrines and aggression with a definite tendency towards aggression and hostility in regards to other species. Their numbers are organized into a strict hierarchy, with power/prestige directly linked to military rank. The current commander of the Stone Warrior legions is General Traag. At present, the Stone Warriors serve the exiled alien warlord, Krang. There are two basic types of Rock Soldiers, brown and grey variations, with the latter only appearing in "Invasion of the Punk Frogs" and "Return of the Technodrome".