Conky is the playhouse robot, who gave Pee-wee the "secret word" each week and served as a "brain" element in the show, similar to Alpha 5 on Power Rangers. He spoke in a high-pitched, slightly-computerized voice with a Porky Pig-esque stutter, and was made from various parts of old electronics, including: old camera attachments (eyes), a boombox (chest), phonograph (torso), and a typewriter with no keys (head) and a Sunbeam Vista VT-40-1 toaster piece as the top skull. The robot referred to himself as "Conky 2000" (after the first season, though he used this in episode #3 in the first season) when Pee-wee turned him on. According to evidence suggested in the episode Conky's Breakdown, there may be more than one Conky robot in Puppetland. Often needs servicing from Johnny Wilson, the repairman, when he doesn't feel well (i.e. malfunctions).
Conky's systems make electronic noises when he moves around. These noises have become very iconic for him. In Love that Story, Pee-wee (playing the part of a librarian that abuses his power) shushed Conky, and he stopped moving. Thus, he gets his name from the onomatopoeic imitation of the sound of a stalling internal combustion engine, which may be the source of the sounds he makes when he moves.
How Pee-wee met or bought Conky is never adequately explored to any degree on the show, except for a small line in Conky's Breakdown from Globey about his owner's manual.
In the episode The Cowboy and the Cowntess, Conky came up with a new dance called "The Conky", which is a slight variation of "The Robot", set to 1980s techno music. In the same episode, he helped Pee-wee prepare French toast, giving him the instructions.
In Rainy Day, Conky helped mop the floor due to whipped cream being sprayed everywhere.
In Pee Wee Catches a Cold, Conky handed Ricardo a thermometer when Ricardo suggested that he take Pee-wee's temperature. The robot later was shocked by Pee-wee yelling for everyone to be quiet so he could sleep (as the man-child had overdid himself and became extremely crabby and sick; their screaming awakened him), but offered to help Ricardo prepare the chicken soup Ricardo brought over. He then went to answer the door (on Pee-wee's orders) for Knucklehead.
In The Restaurant, Conky was the caddie for Pee-wee and the Cartoon King's golf game. He later explained to Pee-wee what the acronym SCUBA stands for - Self Contained Underwater Breathing Apparatus.
In Miss Yvonne's Visit, Conky offered to help vacuum the Playhouse when Miss Yvonne was coming over because of her house getting painted. Like the other residents, however, Conky got tired of Yvonne's slovenness.
In Heat Wave, Conky played the bailiff (meaning the law enforcement officer charged with courtroom security and order) in Judge Herman's makeshift courtroom.
Conky is a humanoid robot, however he has one difference from bipedal robots; instead of legs, Conky moves around on office chair/office stool rollers, similar to Aldebaran Robotics' Pepper robot. His arms are also mismatched; one hand is a metal "crab pincer", the other hand is a clamplike device. Thus, he has never entered the Picturephone, but once crashed into it in the episode The Gang's All Here. In that same episode, Rusty messes with his controls which causes him to malfunction, leading Pee-wee to order the Gang to leave.
In Now You See Me, Now You Don't, Conky and Magic Screen made the calculation that Pee-wee would be invisible forever, which he immediately denied in a frantic state. In Rainy Day, he also calculated that it was going to rain for the majority of the entire day, and later handed Pee-Wee a piece of white paper to make a paper airplane from. In Dr. Pee-wee and the Del Rubios, he solved a mathematical division problem, and in Conky's Breakdown Mrs. Rene wanted Conky to calculate some math problem for her despite his illness.
In the episode Mystery, it is revealed that despite being built by a robotics company, he has a family.
In Front Page Pee Wee, Conky contributed financial news to the Playhouse newspaper.
In Playhouse Day, we find that Conky's favorite holiday is Valentine's Day, and he is quite the romantic.
He once beat Pee-wee in a checkers game in the episode Just Another Day, which proves that he has powerful supercomputers in his circuitry that compute precise calculations.
Thanks to the turntable that makes Conky's bottom, he can play music via phonograph records; he did this in Ants in Your Pants, Front Page Pee Wee and Pajama Party among other episodes. In Accidental Playhouse, Conky also has a built-in translation device located in the same area where the turntable is.
In the Pee-wee's Playhouse Christmas Special, Conky fell in love with Cher.
In Pajama Party, Conky turned off the lights when it was bedtime (on Pee-wee's request, as he forgot to turn out the lights himself), and immediately fell asleep afterwards. He later participated in Pee-wee's fruit salad wedding, holding the book that Pee-wee placed his hand on.
In To Tell The Tooth, Conky brought Pee-wee a tray holding glasses of hot and cold drinks to test if his hurting tooth was sensitive to those temperatures.
He was mind-controlled by Zyzzybalubah in Playhouse in Outer Space into making the alien's own name the secret word. After the extraterrestrial turned off the force field capturing his friends and Yvona, Conky noted that he would love to hear an explanation on the advanced technology of Zyzzy's species. This episode reveals to us that Conky has a definition database for all the Secret Words he gives to Pee-wee on the show.
In Ice Cream Soup, he legitimately assists Pee-wee by helping him navigate Captain Carl to his destination by using his built-in RADAR system, and screams to the Secret Word as well. He screams again in Monster in the Playhouse after Randy scares him and the others.
In Ants in Your Pants, it is revealed that Conky has a built-in smoke alarm system, and we can hear him coughing.
Conky was designed by Wayne White with some input on his final look from Gregory Harrison.