Originally Posted by The Highway
when you finish the game you get these things called Nutri Specs after the end of the game, and you get a trophy from using these to find out what everyone is made out of, or so ive heard
Actually, you're correct. But to be more specsific; you get it after you completely finish off Episode 1.
Then you get a message after you watch the entire credits without skipping which will tell you to go to your map after you finish the opening squence and in the "Hidden Alley", you'll get the power.