Barkback Boar

A species of wild pig that has developed a heavy armored plating on its back and flanks to help protect it from aggressive crystalites.
Boars tend to be one of the largest, strongest, and most adaptable herbivores in whatever biome they live in. Intelligent, assertive, and territorial, they could outcompete other large herbivores but don't graze--they seek out a variety of food types, from carcasses to mushrooms.
Barkbacks are a distinct species of boar whose long, stiff hairs (bristles) evolved to plait together, forming tough layers of overlapping natural armor that kind of resemble shingles. These animals are not the largest boar species, but they are by far the toughest, with thick skulls and heavy tusks excellent for charging and digging.
Barkbacks tend to outcompete other similarly-sized porcines, but more importantly, their armored hides allow them to weather aggressive crystalite encounters. Boar crystalites mimic boar behaviors, which means they can come into conflict with real flesh-and-blood boars over territory or resources, even though crystalite boars don't reproduce or need water or food. Barkback armor means the living boars are more likely to survive crystalite aggression from boar crystalites or predatory-mammal crystalites that often carry out hunting behavior inherited from their animal inspirations, like jaguars or cougars.
Barkbacks are also, of course, far more protected against living predators than most boars, meaning they have few natural predators that can do more than try to take young or sick barkbacks. The only predator that can truly threaten an adult barkback is a crocodile of significant size, which can seize one of the barkback's legs and drag it underwater until it drowns. Even then, the risk is not zero - a barkback can and will attempt to spear any aggressor on its massive tusks, and crocodile corpses gutted by tusks have been found on riverbanks more than once.