Donatello, Michelangelo and others in “Unfinished Business”

Now I'm ready to take on Shredder as the most feared creature of the night: [steps out of his lab wearing dark tights, a utility belt, and a cape and cowl] The Dark Turtle.

Whoa. Way cool entrance, dude.

Donatello, have you lost your mind?

On the contrary. I'm saner than I ever was.

Well, you're staying here until it wears off.

I don't have time for these games. A little Turtle Smoke will handle you.