Directed by Frederik Du Chau and written by Joe Piscatella, Adam Rifkin, and Craig A. Williams, the film stars Jim Belushi, Peter Dinklage, John Slattery, and Patrick Warburton with the voice talents of Jason Lee, Amy Adams, and Brad Garrett.

Underdog/Shoeshine, voiced by Jason Lee, was played by a lemon beagle named Leo[6] sporting a red sweater and a blue cape.

Ridiculed and rejected, the beagle leaves and is abducted by Cad Lackey, who takes him to Simon Barsinister's lab.

Bitter that his proposal for genetic experimentation was declined, Barsinister plans to prove his theory by testing his new serum on the beagle.

The beagle escapes and runs amok in the lab, starting a fire and becoming exposed to various chemicals, which modify his DNA and give him superpowers.

Barsinister and Cad later find a new lair beneath the city and plan a robbery to fund the reconstruction of his lab.

Adopting the alias "Underdog", Shoeshine becomes the city's resident superhero, donning a shrunken red sweater and blue cape as his outfit.

Barsinister synthesizes Underdog's superpowers, feeds Shoeshine an antidote to the serum, and gives the super pills to three trained German Shepherds.

While they restrain Barsinister, Underdog appears on the roof and saves Molly and Polly, cut off ties them up, instructing them to take the mind control serum to the police while he removes the bomb.

[7] In June 2005, it was announced Spyglass and Disney were finalizing negotiations with the possibility of starting production that fall in Canada.

The Plain White T's rendition of the theme, titled "Underdog Rocks", plays at the beginning of the film but was not included on the album.

The site's critical consensus reads, "Underdog is a mostly forgettable adaptation that relies far too heavily on recycled material and sloppy production.