| Issue | #13 |
| Published | June 1977 |
| Frequency | bi-monthly |
| Cover Price | 0.30 USD |
| Pages | 36 |
| Editing | ? |
| Characters | Underdog; Simon Bar Sinister; Cad |
| Genre | Superhero; Funny Animals |
| Notes | Note incorrect punctuation in title on cover (should be "gets" not "get's"). |
| Characters | Underdog; Simon Bar Sinister; Cad; Polly Purebred |
| Synopsis | Simon and Cad make giant robots to distract Underdog but accidentally kidnap Shoeshine Boy. |
| Genre | Superhero; Funny Animals |
| Characters | Iron Man [Tony Stark]; Monotony Man |
| Synopsis | Monotony Man makes everything grey and dull on April Fools Day, but Iron Man saves the day by dropping Hostess Cup Cakes for everyone. |
| Genre | Superhero |
| Characters | Underdog; Cad; Simon Bar Sinister |
| Synopsis | Simon makes a giant Seltzer cannon. |
| Genre | Superhero; Funny Animals |
| Characters | Underdog; Polly Purebred; Pie-Man |
| Synopsis | The Mayor is going to unveil a sculpture of Underdog but the Pie-Man interferes. |
| Genre | Superhero; Funny Animals |
| Characters | Underdog; Polly Purebred; All-Mighty Duck |
| Synopsis | All-Mighty Duck knocks out Underdog so he can rob all the banks in the city. |
| Genre | Superhero; Funny Animals |
| Characters | Underdog |
| Synopsis | Underdog is relaxing in his Shack of Solitude when he discovers a space creature tossing his stuff around. |
| Genre | Superhero; Funny Animals |