Which Teenage Mutant Ninja Turtle wears a blue mask?

In 'The Flintstones', what is the name of Fred's wife? In 'The Flintstones', what is Fred's catchphrase? In 'The Jetsons', what is the name of the family's robot maid? In 'Teenage Mutant Ninja Turtles', what is the name of the turtles' rat mentor? In 'Sesame Street', which Muppet lives in a trash can? In 'Sesame Street', which Muppet loves cookies? In 'Sesame Street', what color is Elmo? Who created 'The Muppet Show'?