Mr. Sunshine is the character from the Nickelodeon animated TV series CatDog. He is voiced by Billy West.
He is a green-skinned, shirtless creature with a human-like head, a thin, once-coiled tail and no apparent emotions, who has a monotone voice and demeanor very similar to the actor Ben Stein.
His name is ironically the very opposite of his personality, and he often nods off and falls asleep in the middle of doing things, such as performing a very unengaging magic act. It is suggested that his sardonic and pessimistic personality may be Dog's fault. Very little is known about him. Thus it is apparent that not even the characters in the show know what he is.
- Like Rancid Rabbit, his job is vary despite working as a garbage person.
- In "Royal Dog", Mr. Sunshine tells the story of the painting and how it relates to english royalty about Cat and Dog.
- In "The Ballad of Ol' 159", his first name is reveal to be Cornelius, and he first meet CaDog as a kid and has a job as a garbage truck.
- In "Just Say CatDog Sent Ya", he works as a protector of CatDog's Burger Bones Restaurant.