The Animated Adventures of Puppet Homestar!
Also, I was re-watching "Drive Thru" today because I was in a weird mood, and I noticed something: You know how Strong Bad says in the email "imaginary" that he often gets imaginary and invisible mixed up? He does it in that toon too! When he and the Cheat are pretending to be at a restaurant, he refers to it and the waiter as invisible.
Interesting bit of accidental consistency.