Dwayne (Inside Man)

Dwayne  is a twin under Jimbo's cap.

History
When Dolph come home after made his own comic he took of his cap and he wondered what he as in mood to eat. Under the cap was a creepy-twin that told him he want pizza nad Jimbo said it sounds good to him.

Behind the Laughter
The comic story What's Under Jimbo's Cap?, which also appears in Jimbo Jones #1, shows that Bart's theory is correct and Martin's is partially correct about what Jimbo had under his cap.