Occasionally, the Wario Bug may attack the player between microgames, either by crushing the player with its fist or by spitting out two to five noses that must be defeated before they explode. The Wario Bug performs his fist attack after three microgames, spits out bombs after nine, and either attack after 15. When the player encounters the boss, the Wario Bug roars. After defeating the boss, its nose starts to increase in size, and the Wario Bug is sucked into it. At this point, the player has to attack the nose by plugging the unplugged nostril (if done in co-op, both players must plug one nostril each at the same time); failing to do so causes the nose to sneeze, and the player loses a life and must try to plug the nose again with a different crew member. Once this condition is met, the nose explodes, and the Wario Bug is destroyed.