How did anyone get the idea that Unfezant is good? What set can you run for Unfezant? Its most reliable Flying attack is... Aerial Ace (I guess if it holds a power herb, you can use Sky Attack... once).
Unfezant @ Life Orb/Power Herb
Aerial Ace/Sky Attack
252 Atk/252 Spe/4 SDef
Is the only set it can run effectively at all.
Too bad it didn't get Steel Wing or a Fighting move. That might have tipped it off.
Meh. Not that good. Staraptor still takes the cake.