Popeye has four nephews: Pipeye, Peepeye, Pupeye, and Poopeye.

He works at Spacely Space Sprockets, turning the Referential Universal Digital Indexer (R.U.D.I.) on and off.

The original Phantom Cruiser was painted canary yellow and shaped like a stylized bird.

Foghorn often fancies himself a mentor figure to the younger roosters, especially Eggbert (or Egghead Jr.), tossing off bits of self-styled sagacity interjected with phrases like "Pay attention, son", or "Look at me when I'm talkin' to ya, boy."

Every time Bugs dares Sam to "step across that line", he cannot help but do so, even if he steps off into empty space or down a mine shaft.

Betty Boop's strict Jewish parents make only one appearance, in the cartoon Minnie the Moocher (1932). Betty's parents are all over her case, hassling her because she will not eat her sauerbaten, so Betty runs away from home with her boyfriend Bimbo--only to return after she gets lost in a haunted cave and encounters a ghostly walrus.

In A Tale of Two Kitties (1942), Tweety was a featherless pink baby bird. The yellow feathers were added later to satisfy censors who objected to his lack of clothing.

Sarsaparilla leaves are the primary source of nutrition for the Smurfs along with smurfberries.

The Professor (real name: Professor Nutty Nut-Meg as seen in his papers) is Felix's archenemy and, in most appearances, is trying to steal the Magic Bag of Tricks, though he always winds up failing in the end. In some episodes, when the Professor gives up on his episodic schemes, he laments: "Oh, what's the use!!!!!"