The Evil Flynn-Fletcher family robots are life-size robotic duplicates of the Flynn-Fletcher family created by Carl Karl. They started off as minor characters, but later became the secondary antagonists in the Where's Perry story arc.
In their first appearances, they were only used to help replace any missing members. This was shown in I Was A Middle Aged Robot, when Agent P uses the Lawrence robot for the Danville Father-Daughter competition while the real Lawrence was accidentally erased of his memory.
Eventually, in the Where's Perry story arc, they were all programmed by Carl (who turned evil after being accidentally shot by a Ultimate-Evil-Inator ray by Heinz Doofenshmirtz) to do evil. To that end, the robots try to track down Agent P in order for Carl to use his pawprint to gain access to the O.W.C.A. mainframe. They manage to track him down to Africa, where it is revealed that Carl has made other robotic duplicates of other characters during the way (Doofenshmirtz, Major Monogram, Norm, Isabella Garcia-Shapiro, Vanessa Doofenshmirtz, Baljeet Tjinder, Buford Van Stomm, and others). Carl orders his robots to capture Perry, but the platypus has recruited several animals in the wild to help him fight against the robots. The robots are then defeated and destroyed, except for Robotic Candace, who sacrificed herself to destroy Robotic Phineas in order to give the real Candace a phone to call Jeremy Johnson. Following the robots' destruction, Carl is turned back to normal by Doofenshmirtz (who uses his Re-Good-inator to reverse the effects of the Ultimate-Evil-Inator). At the point, Monogram, Carl, and Doofenshmirtz head back home to Danville in their remaining jet, using its large magnet to pick up all the remains of the destroyed robots.