It's Underdog!

So you would think that a movie about Underdog, an old cartoon, would be pretty stupid and not worth the effort to rent and then watch...wrong-o. Underdog the movie is so funny!! I laughed pretty much the entire movie.
"It's a bird, no it's a plane, it's a frog! A frog?!"
"It's no bird, no plane, no frog, IT'S UNDERDOG!!!"
What else rhymes with dog?
Great movie. So funny. Highly recommend.