The Batman

Cluemaster's diet wouldn't let him get as tall as he did. With his weight, he should have died a long time ago from a heart attack, or severe diabetes.

Even given the show's license with physics and the such (like Penguin's martial arts), Cluemaster's build and short legs would prevent him from getting up and walking over to Batman without having his legs or hips shatter under his weight.

The show mentions that Yelena's family defected from the Soviet Union, meaning that the time when Artie got his Kremelos was, at latest, in the 1980's. However, we later see him eat some of them. How did he keep them fresh for so long? (Reply: He should be smart enough to overcome such a simple problem such as food expiration, or they might just simply have the shelf life of uranium.)

In the teaser clip at the beginning, we see Cluemaster behind the wheel of the garbage truck. However, his girth would render him incapable of driving any sort of motor vehicle.

Yelena, during her computerized opening chess match, declares that she is moving her bishop. She then proceeds to check a black square, followed by a white one. This is an impossible move for a bishop, and in fact the move is precisely how a Knight would move in chess.

Artie claims that the show cheated him, but Jupiter's moon (Lysithea) was discovered by S. Nicholson in 1938, not 1937. This means that the game show was right, and Artie really was wrong. (Reply: He's a really sore loser and won't accept the facts. His claim was also based on the fact that Yelena was given easier questions because the producers wanted him to lose.)