The Liquidator is a member of Negaduck's Fearsome Five, composed entirely of water. He and Megavolt are the only non-duck members of the Five. The Liquidator is best known for his advertisement-style banter, likely due to his backstory as an advertising magnate. The Liquidator is a minor player in the second Disney vs Non Disney Villains War.
Disney vs Non Disney Villains - Part Two
The Liquidator, along with the other members of the Five, seize control of the criminal underworld after the fall of Madam Medusa and Cruella de Vil. Their dominance goes unchallenged for some time, but the Gangreen Gang eventually musters up the nerve for a fight. The Gang, enhanced with superpowers by Hades, immediately proves its worth. The Liquidator proves a more successful combatant than his peers, successfully taking on Lil' Arturo. However, a sonic belch from Grubber sends Megavolt flying into the Liquidator; the resulting clash leaves both members of the Five knocked out.