Thats an assistant, not a stooge.
Stooge: an unneeded person put somewhere to enhance the effect even though they know whats going on.
Assistant: a needed person that is part of the trick because the trick cannot be done without someone knowing whats going on, so the person has to be in on the effect in order for the effect to be done.
Notice the difference, an assistant makes some tricks work, like floating a person or sawing a person in half. A stooge is not needed to make it work, but is only there to enhance it.
As for Angel claiming his stuff to be real, I don't think he has actually like claimed it to be real, and he does say its illusions. But one episode, the ghost one for halloween, he did cross the line because it was made out to be real, and thats how (in my opinion) people perceived it as. And since its fake of course, I think its very wrong to make it out to be real. Everything else though I think he is ok cause he doesn't claim it to be real, and he says its illusions. And I think as long as you aren't lying to your audience and helping them to believe you are more than someone just like them then you are ok.
i dont like the way he uses the "assistant", becuase she acts as if she is just a random person. So to me that's a stooge. Plus the meaning of stooge is
Main Entry: 1stooge
Etymology: origin unknown
1 a : one who plays a subordinate or compliant role to a principal