It has more health than other Imps and can charge at Jennifer, shoving her to the ground. Before they charge, they like to put their arms up, letting the player know when to dodge.
The Pig Imp could symbolize Amanda's thoughts about herself, due to her low self-esteem, as well as the fact that she is seen wearing a pig paper bag mask. It could also symbolize Xavier's intense appetite. When Xavier disappears, leaving only a half-eaten biscuit behind, his friend Nicholas says he eats like a pig, and shortly after searching for him, the first Pig Imp appears.