Beppo the Super-Monkey joins with the Wonder Twins and their space chimp, Gleek, to stop the evil ape Gorilla Grodd from turning a day of fun in Metropolis into a disaster.
When most of the Legion of Super-Pets are lured away by false alarms, the Legion of Villain Pets attacks their Kennel of Justice; can the lone remaining Super-Pet, Proty the shape-shifter, save the world by himself?.
Ray Palmer has found a way to shrink himself and his dog Spot to atomic size and become the superhero Atom--so when friend and rival Doris Zeul comes up with a way of increasing her size and becomes Giganta, it is up to Atom and Spot to convince her of the error of her ways.