Condiment King (alias Mitchell Mayo or Buddy Standler) is a DC Universe minifigure that appears in LEGO Batman 3: Beyond Gotham.
Background
DC Animated Universe
Buddy Standler was a popular TV stand-up comedian who made fun of The Joker. Using technology stolen from Mad Hatter, Joker brainwashed Buddy into becoming laughably bad supervillain known as The Condiment King in order to ruin his reputation.
As the Condiment King, Buddy equipped himself with guns that shot out ketchup & mustard. Ultimately while trying to rob a restaurant, he was confronted by Batman before slipping on a puddle of his own condiments and falling off of a balcony. Following this he was hospitalized under police custody.
Comics
In DC Comics, Mitchell Mayo is the Condiment King. He is a minor criminal who is often considered a joke. He is an enemy of Batgirl.