The Brainteasers are villains from Darkwing Duck. They are a group of hat-shaped alien criminals who attach themselves to someone's head, then control their every action. They feed on metal, which they must make the host eat. The only way to remove them is by making the host sneeze. They have crash-landed on Earth after their ship is shot-down by the Girdist Revolutionaries, the good-guys from their planet. They decide to take over Earth, due to the heavy weaponry from the planet. They are defeated by Honker, who then become their sworn enemy, and also a hero on their home planet.