Wario is a human who works part time as a freight conductor for The Transportainian Railway Co. When he’s not doing that, he’s being lazy, killing time, or driving around in his car.

Wario has several negative characteristics in general, among them laziness, ruthlessness and gluttony, unlike Mario, who is portrayed as kind and heroic. Wario's most prominent trait is his greed, as he is often portrayed as being unscrupulous when opportunities arise to gain wealth, whether they are good or bad.

His voice should at least come close to sounding like either James H. Sawyer Sr., Thomas Spindler, or Charles Martinet.