The Firepuff Girls Z are three girls (Isabella Garcia-Shapiro, Daisy Hernandez, and Didi Martinez-Hernandez) who are turned into superheroes by accident by Phineas Flynn and Ferb Fletcher when exposed to the highly radioactive Pizzazium Infinionite. They have Zuper Hero modes in which they become unstopabble. The problem is, they can only use the mode in life-or-death situations. They each have similar powers, but each girl has an individual power that is exclusive to her.