The Big Bad Wolf is a fairytale character from the fairytales Little Red Riding Hood, The Wolf and the Seven Young Goats and Three Little Pigs. He is seen in the Fairytale Dimension in the 1987 TV series episode The Turtles and the Hare.
While searching for a siranium crystal, Donatello tunes into a fairy tale dimension. The Ninja Turtles watch as Chicken Little runs along a road shouting that the sky is falling. The Big Bad Wolf is nearby and comments that Chicken Little is a nut. Then he goes in search of the Three Little Pigs.