VRETCH is a hawkish alien customer who enjoys nothing more than sitting at the bar and heckling Ken… think of the old grouch Statler from The Muppet Show, or Don Rickles.  He loves to wait until Ken is in earshot before he loudly tells Cozmo, “Hey, how many humans does it take to change a glowpanel?”  Vretch is the first person Ken gets into a brawl with at the bar, and Cozmo gives the kid his “customer is always right” lecture.