Norm

Norm is a robot from Phineas and Ferb that is Doof's evil robot. First seen in "Greece Lightning", he was to defeat Perry because Doof couldn't defeat Perry, but was turned off by Candace. In the episode "Phineas and Ferb-Busters!", he was to replaced by a smaller robot, but it grew and almost destroyed Doof, but Norm slipped and coffe ruined the robot. In "Undercover Carl", it is seen that he can transform into a 3-axle truck.