Together, the duo fights various an

Together, the duo fights various antagonists, most commonly Doctor Drakken, assisted by his beautiful henchwoman Shego, whose unsuccessful world domination schemes appear in most episodes of the show. The other common villains are Monkey Fist, Duff Killigan, Señor Senior, Sr. and Jr., and Professor Dementor. Monkey Fist starts out as an Indiana Jones-like persona, but soon turns into a megalomaniacal practitioner of monkey kung fu also known as Tai Shing Pek Kwar as shown in the episode Monkey Fist Strikes written by Gary Sperling, which is a real-life fighting discipline supernaturalized and portrayed as mystical in the series.[11] Duff Killigan is an overweight Scottish golf player who wears a kilt and attacks his opponents with exploding golf balls.[12] The Señor Senior father and son duo are at first just extremely rich people owning a large resort island. However, they are inadvertently pushed into the evil business by Ron Stoppable. Senior, the father, is more business-oriented, as his son tends to exploit the evil ways for not-so-evil deeds, such as opening a personal disco.[13][14] Little is revealed about Professor Dementor, an antagonist with a German accent obsessed with world domination schemes like Doctor Drakken, his sworn enemy, although Dementor usually turns out to be more successful.[15][16]