HP is the abbreviation of Health Points in Super Paper Mario. Mario can, with a certain amount of points, up his max HP everytime he gets to a new level of points by 5 HP. He can also purchase an HP Plus for more HP. Some enemies' HP is listed as "??". This means that the enemy is always defeated with either a set amount of stomps or a special maneuver, no matter what. It is usually impossible to damage these enemies in the conventional way.