Dizzy is a young Tasmanian Devil who wears a propellered beanie and has two different-colored eyes. He will eat anything and speaks in slobbering, monosyllabic outbursts. Dizzy also often moves by spinning like a miniature tornado, often demolishing anything in his path.
According to one episode, Dizzy has three human girlfriends, who like him because of his wild personality. Additionally, Dizzy's spare time is often spent listening to rock music, eating (pizza rolls are his favorite), and watching television. Dizzy's classmates Buster Bunny, Plucky Duck, and Hamton J. Pig once attempted to civilize Dizzy in order to improve his existence and interests, and it worked, but Dizzy was unhappy and begged to become his old self again (a task Buster, Plucky and Hamton accomplished). Dizzy Devil's I.Q. is between that of the Dopefish and a chicken leg. In other episodes, Dizzy learns it's not nice to step on insects, becomes Elmyra Duff's pet for an unfortunate period (she thought he was a dog), had a brief fling with a small tornado, and is discovered by Buster and Babs Bunny to be incapable of writing.
"Th-th-th-th-that's all, folks!"
In homage to Porky Pig's classic line "Th-th-th-th-that's all, folks!", each episode of Tiny Toon Adventures concluded with one or more of the characters speaking a line. Dizzy's end tag credit was "Show over!", followed by Dizzy devouring the entire image on the screen.