At first, Perry the Platypus seems to be a mindless pet that doesn't do much; however, Perry has a secret. He's actually a secret agent known as Agent P! Perry works for the O.W.C.A (The Organization Without a Cool Acronym) and is their best agent. Perry gets his assignments from his boss, Major Monogram, with the help of an unpaid intern, Carl Karl.
Perry's owners are Phineas Flynn and Ferb Fletcher. They have no idea their pet is a secret agent due to the fact that if they did find out, Perry would be forced to be relocated to a new family. Phineas and Ferb love Perry enough that they were willing to have their minds erased after they learned of Perry's secret in Phineas and Ferb The Movie: Across the 2nd Dimension.
Perry's main nemesis is Heinz Doofenshmirtz. For most of the series, Perry and Doofenshmirtz had a frenemy type relationship. While Perry often stopped Doofenshmirtz's evil plans, Perry has also helped Doofenshmirtz when he's in trouble and has made sure Doofenshmirtz never gets seriously hurt. At the end of the series, when Doofenshmirtz has decided to give up being evil, Perry and Doofenshmirtz have become friends and have even worked together to stop the evil Professor Parenthesis.
In Phineas and Ferb: Mission Marvel, Perry has even helped superheroes after they had lost their powers. Perry has also appeared in episodes based off of Star Wars and Wizard of Oz.
This Lego Idea is capable of transforming between Perry's "mindless pet" and his "Agent P" forms. His hands and each of this fingers can move as well.
I decided to build this set after watching Phineas and Ferb on Disney+. Perry is one of my favorite characters, and I just had to try and build a LEGO version of him for LEGO Ideas. I also made a video for this Lego Idea on youtube to help gather more support. Here's the link: