Chammy is a withered toy animatronic, however, he doesn't seem to be withered. He only has blood flowing out of his eyes, mouth, nostrils, and left ear, has big ears look like Withered Freddy's ears from Five Nights at Freddy's 2, a dark-green ear and nostrils, light-green snout, a lime green torso, black-thin eyebrows, a hollowed right eye (some points), a glowing left eye (some points), and bloddy finger prints over his fore head.
Chammy is the only replaced character in Five Nights at Piggy's as he was replaced by Piggy Ham Bacon. This excludes the other characters however because they were only remade.
Similar to his replacement model, Piggy, in the final game, Chammy is the only animatronic in the beta that is able to travel into the Buffet Stand.