The film 'Underdog' is a family-oriented superhero comedy that does not feature any identifiable LGBTQ+ characters or themes. Its narrative centers on a dog gaining superpowers and fighting crime, with no elements related to queer identity or experiences.

The animated film 'Underdog' does not feature any identifiable transsexual characters or themes. The narrative focuses on a dog gaining superpowers and becoming a superhero, with no elements related to transgender identity or experiences.

The film does not feature any female characters engaging in or winning close-quarters physical combat against one or more male opponents. The primary action involves the male protagonist, Underdog, fighting male antagonists.

The 2007 film adaptation of "Underdog" maintains the established genders for all its primary characters, including Underdog, Sweet Polly Purebred, and Simon Bar Sinister, as depicted in the original animated series. No canonical characters were portrayed with a different gender.

The film is an adaptation of an animated series where the main characters are animals or humans whose original voice actors were white. The live-action adaptation maintains the racial portrayal of its human characters and the species of its animal characters, with voice actors of the same race as the originals. No established character underwent a race swap.