Tasty Paste Monster is a character from the Quack Pack episode, Tasty Paste.
The Monster was created when a scientist who made the robots for the Tasty Paste and also wanted revenge on Huey, Dewey, and Louie for firing him by sabotaging the machines and made a big mess out of the Tasty Paste, then, lightning struck on it and it turned into a monster who rampaged Duckburg.