I Haven't Got a Hat is notable for featuring the first appearance of several Warner Bros. cartoon characters, most notably Porky, who would become a star, but also Beans the Cat, a minor Looney Tunes star in the mid 1930s.

Originally introduced in the 1937 short Porky's Romance, Petunia Pig looks a lot like her significant other, except she wears a dress and has braided black hair.

Porky's most distinctive trait is a severe stutter, for which he sometimes compensates by replacing the words he is attempting to say with something else. For example, "What's going on?" might become "What's guh-guh-guh-guh ... what's happening?"

Porky usually wears a blue jacket with a red bow tie.

Starting with Porky's Duck Hunt (1937), Porky was cast as a duck hunter pursuing Daffy Duck, largely paralleling the Elmer Fudd/Bugs Bunny dynamic.

Porky travels to Dark Africa, then Darker Africa, and finally Darkest Africa in search of the rare dodo bird, worth $4,000,000,000,000 p.s. 000,000,000 dollars. When he finally captures the rare bird, Porky proclaims to the audience that he has captured the last dodo. The dodo mockingly replies, "Yes, I'm really the last of the dodos. Ain't I, fellas?" And a multitude of dodos appear, yelling "Yeah!"

After spending most of the cartoon vainly trying to convince Friar Tuck (Porky) to join his band of merry thieves, a frustrated Robin Hood (Daffy) decides to become a friar himself, telling Porky, "Never mind joining me, I'll join you. Shake hands with Friar Duck!"

Like the other characters in the series, Hamton J. Pig attends ACME Looniversity, where his mentor and favorite teacher happens to be Porky.

Pinkster Pig is Porky's descendant and has his trademark stutter. He is an old friend of Danger Duck (Daffy Duck's descendant), but becomes a villain when he is adopted by Stoney and Bugsy (descendants of Rocky and Mugsy).

He tries to get Michael Jordan's autograph when the basketball legend is first recruited to join the team and later plays for the Toon Squad in the game itself, scoring one basket.