Gyro Gearloose showing The Big Cheese to Scrooge McDuck

A rare piece of Toontown Online concept art shows Gyro Gearloose unveiling his invention of the Cogs to Scrooge McDuck.

Gyro Gearloose is a fictional Disney character, a chicken who is an employee to Scrooge McDuck, created by Carl Barks for the Walt Disney Company. In the Toontown universe, he is known as the creator of the Cogs, among many other inventions such as the portable hole. Gyro's name was only mentioned in an old installer video and some old trading cards from Toontown Online, as well as several Alternate Reality Game puzzles from Toontown Rewritten revolving around the shenanigans of Doctor Surlee in the game's storyline.

A rewritten story

"My name is Gyro Gearloose, and today my story is rewritten."
―Gyro Gearloose before rewriting himself.[src]
(Surlee's Papers) 5

Based on the events of Toontown Online's old installer video, the result of Gyro Gearloose's robot initiating an order for the Cogs to invade Toontown thanks to Scrooge McDuck's unwise decision caused the Toon Council Presidential Elections to suffer from an incoming invasion known as Doomsday. The winner of the election, Slappy, was saddened by the first Cog that showed up during the event: a Yesman. Toons, including Flippy, fought against all of the Cogs to put an end to Doomsday with great success.

Having felt guilty for the disappearance of Slappy and his invention, the Cogs, becoming evil instead of pursuing their intended purpose to help Toons across Toontown, Gyro Gearloose revisited his lab that was transformed into Cog Nation and invented the Rewritten Device that would allow him to rewrite himself into becoming a completely different Toon by the name of Doctor Surlee in order to hide his identity and create an experiment called "Toontown Rewritten". Now known as Doctor Surlee, he traveled back in time starting on October 26, 1998 using an unstable pocketwatch, which prompted unforeseen anomalies to occur in the following years.


  • Even though the papers were written by Gyro Gearloose, the URLs say they are Doctor Surlee's.
    • This reveals that Doctor Surlee and Gyro Gearloose are the same character. They had both mentioned creating the same inventions like the Silly Meter. Doctor Surlee had also once noted that "Surlee" is in fact his first name, not his last. An ARG on March 26, 2016 revealed a message from Doctor Surlee's terminal, LL-TERMINAL43, with the initials "S.G.", which stands for Surlee Gearloose.
      • In the same ARG on January 26, 2018, Doctor Fissionton revealed Doctor Surlee's full name to be Surlee Gyro Gearloose.
  • In a video called Toontown Ad: It's Different In Our Town, the mailbox that Joey walked past by says "Gyro Engineering".
  • In an episode of the 2017 DuckTales reboot, the Cogs were mentioned on Gyro Gearloose's list of inventions that had gone evil. It was confirmed by co-producer, Frank Angones, that this was a reference to Toontown Online.[1]



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