Johnny Worthington III (voiced by Nathan Fillion) is the primary antagonist of Jaden goes to Monsters University. He's the president of the Roar Omega Roar's, and is Mike's rival. Johnny was interested in having Sully join him for his scary reputation, but when Mike was doing better in classes than Sully, Johnny kicked him out, and replaced him with Randall Boggs. Johnny planned to win the Scare Games and ruin Mike and Sully's reputation.
