Trivia Time

From Homestar Runner Wiki

PomPom's dog. Here are some concept sketches from the Museum. He's never appeared in a Homestar cartoon, unless you count his likeness represented by a cookie jar in Where's The Cheat? and Strong Bad Is In Jail Cartoon.

Complete Filmography
(Cancelled) BUT
The Isle of Pom (Debut) (Food Dish)

Cookie Jar Appearances:
Where's The Cheat?
army (Easter Egg)
Strong Bad Is In Jail Cartoon

Also in Homestarloween Party, one of the girls' dog "Chris" looks a lot like Trivia Time.