Krypto the Super-Dog and Superman are inseparable best friends, sharing the same superpowers and fighting crime side by side in Metropolis. However, Krypto must master his own powers for a rescue mission when Superman is kidnapped.
 
Fun story.  Fun movie.  Nuff said.
 
FUN FACT:  With the exception of Vanessa Bayer's PB, all League members are based on actual DC Comics characters.  PB the Wonder Woman-styled pig is a homage to Justice League Unlimited: This Little Piggy (2004), where Wonder Woman was transformed into a pig and at the end of this film when PB poses, the title appears among the slogans surrounding her.