Worst Fairytale Creature?

I could not stand the Three Pigs.
In the scene where they meet Shrek, they would simply step forward, say a line and step back. I know it was just so they didn't upstage Shrek, but they could have found a better means of moving than that. It was very "junior high" stage moment. Plus the accents were absolutely awful.

Tweedle Dum was just as bad. Her voice was very distracting and in the beginning of "Freak Flag" instead of being able to convey the emotion through her words or her singing, she has to do the whole feet-stomping thing.