Uncanny Dodge (Ex)
Starting at 4th level, a ninja can react to danger before her senses would normally allow her to do so. She cannot be caught flat-footed, nor does she lose her Dexterity bonus to AC if the attacker is invisible. She still loses her Dexterity bonus to AC if immobilized. A ninja with this ability can still lose her Dexterity bonus to AC if an opponent successfully uses the feint action against her. If a ninja already possesses uncanny dodge from a different class, she automatically gains improved uncanny dodge instead.