Liquidator's first showing was in the cartoon
Darkwing Duck is in an episode called "Dry Hard".
The creation of the Liquidator came about by accident. It starts out as a water shortage in St. Canard, the home of Darkwing Duck. In all the water sales happening, an eager salesman named Bud Flud wanted a monopoly so people would only go to him to buy the water. In order to destroy the competition, Bud goes to each competitor's bottling plant and pours chemicals into the water supply. However, Darkwing Duck discovers about the water companies' contaminated water and suspects that someone is ruining the water market. So, Darkwing Duck goes on a stakeout to one of the the last two water bottling plants, Koo Koo Water. As Darkwing supects, someone was tempering with the businesses and sees Bud pouring chemicals into a vat of water. There was a struggle and Bud fell into the contaminated vat of water. Darkwing attempts to save Bud with a broomstick, but when he pulls out the broomstick from the vat, it appears that the water had eaten away the portion of the broomstick that touched the water.
After what had happened, everything seemed normal once again. Later on, weird things start ocurring with water systems, and a mysterious bottled water manufacturer comes into St. Carnard. With all the water systems disabled, except for the mysterious new manufacturer, prices for bottled water rise exorbitantly high. Darkwing accosts the new dealer, and the newcomer tells Darkwing that he once was Bud Flud. Now, due to the contaminated water- he is the Liquidator! The Liquidator shows Darkwing his true wattery appearance and his power to control water.
Due to the chemicals in the water, Liquidator speaks mostly in sales pitches. In the end, the Liquidator attempts to rob all of St. Carnard by transforming all of the water into rubber. Darkwing tries to stop Liquidator several times, such as freezing him, and evaporating him, but they all failed. Ultimately, the Liquidator is defeated when Darkwing throws cement to harden the Liquidator.