He is a very unpopular agent with his colleagues, clear when the other agents laugh from Doofenshmirtz' racist joke about ducks (The famous Duck song joke) and then when the agents glare at Agent D after learning that he set up Doofenshmirtz's firing from the agency by filing up many complaints (possibly false ones) to Human Resources.
Mindless animal mode
In mindless animal mode, he seems bigger and his eyes are slightly pointing in two directions. His feathers on his head are a bit fuzzy.
- In Phineas and Ferb the Movie: Across the 2nd Dimension, his feathers on his head are in an incorrect color. This could be an error.
- According to his secret file, he is flexible to take on many missions due to being semi-aquatic. He is also very good at hand-to-hand combat. (Where's My Perry?)