Identical-looking, looking much like each other, considering that they're twins; espcially since they both wear glasses.
Highly intellegent, but rather rude, arrogant, self-bragging, and vain. They're known and proven to be overconfident because of letting their intellectual skills and strategies get to them, and appear to have no common sense the way Scooby and Shaggy do.
A Pup Named Scooby-Doo
They both were judging Scooby and Shaggy because of their eating habits. Betsy using smart-aleck remarks causing them both to make a mockery of them. They were competing in the contest on the show For Letter or Worse. Having already guess a very long word in the puzzle, "antidisestablishmentarianism", they bragged on themselves of being in the lead. After everyone got scared away from the Ghost of Al Cabone, the show continued after the ghost being Prestina was arrested. They fished a letter "Z" and found out the word is a five-letter word with two Z's, but couldn't figure it out because of never hearing such a word. After Shaggy and Scooby answered the bonus word being "Pizza," they were afraid they were about to have an aquattic encounter. Having lost the game, they took a dive in the water after Davie the Letterguy pulled the lever sending them in the water.