From Underdog:
Simon Bar-Sinister
Riff Raff
and my all-time favorite, Simon’s henchman Cad Lackey.
Sarcastro
Bi-Polar Bear
I would say my all time favorite and most fun to say would be
“Augie Doggy and Doggy Daddy”
It was Jimmy Superfly Snuka.
Personally, I’ve got to go with a Looney Tune done by Chuck Jones that detailed the adventures of…
The Dover Boys of Pimento University (Ol’ PU) – Tom, Dick and Larry…
Their Sweetheart, Sweet Dora Standpipe…
and the moustache-twirling, hard-drinking ne’er-do-well Dan Backslide.
From The Simpsons, though they were fake (the cartoons within the cartoon):
Disgruntled Goat
Ku Klux Klam
Flatulent Fox
Dinner Dog
“Commander Bragg”
minor nitpick: the name was “Commander McBragg”
My favorite: Wile E. Coyote, Super Genius.
And my brother named his dog “Jeep” (sp?), after Popeye’s dog.