In addition to the main television series , Perry have appeared in several pieces of Phineas and Ferb merchandise . To date , he have appeared in all Phineas and Ferb novelizations , published by Disney Press . The character have been adapted into a 20 inch plush toy , released by The Walt Disney Company . The plush have a button on its hand that allow it to emit Perry 's signature chattering noise . Certain t @-@ shirts based on the series released by both Disney and the online retail website Zazzle also display Perry and the phrase " Hey , where 's Perry ? " which most characters like Phineas , Isabella , Stacy , Irving , Ferb , and Lawrence utter when Perry go to Major Monogram in his secret lair in almost every episode . There also is a T @-@ Shirt with Perry 's face . Perry appear in the Nintendo DS video game based on the series , simply titled Phineas and Ferb , where a mini @-@ game involve Perry stopping Doofenshmirtz 's latest evil scheme . As of 1 April 2014 , Perry is also a playable character in the video game Disney Infinity .