Ramrod

The Waddlemeyer Ramrod (or simply known as the Ramrod) was a trachio-specific device that disrupts gravitational bonds and allows manipulation on a micro scale. In layman's terms, it makes objects and people float. It appeared in the Darkwing Duck pilot episode "Darkly Dawns the Duck".

History
Professor Waddlemeyer developed a highly destructive government secret weapon called the Waddlemeyer Ramrod. In a dastardly attempt to steal the Ramrod and arm it, the nefarious Taurus Bulba kidnapped the professor's last known living relative, young Gosalyn, thinking she knew the secret arming code. Fortunately, Gosalyn was rescued by Darkwing Duck, who kept her safe in his secret hideout atop a tower on the Audubon Bridge. Unbeknownst to Gosalyn, Prof. Waddlemeyer had secretly taught the code to her in a lullaby he used to sing to her each night. Bulba learned of the secret and was nearly able to carry out his threat.

Darkwing Duck was able to wreck the Ramrod by randomly pushing the buttons on its control panel, causing it to overload and blow up.

Code
The code to activate the Ramrod was taught to Gosalyn, without her knowledge, via a lullaby that her grandfather would sing to her.

The color-coded order which activates the device is:

Yellow, blue, red, blue, purple, purple, blue, purple, green and yellow.

Darkwing learns the code after Gosalyn shares the lullaby with him and he realizes that the buttons on the Ramrod correspond.