My Alakazam or Crobat w/ Inner Focus. No flinch for you. With 252 Spd Evs on both and speedy natures, you'll be eating a stab psychic or flying type attack. Flaw found. If U-Turn was priority, it'd be a sick setup. It's still good, nonetheless. I honestly wouldnt change it, because most of the metagame wont see it coming.
Alakazam / Inner Focus
252 Spd. EVs, 252 HP for a little "bulk", 4 Sp. Atk.
Trick (here, you can have this)
Substitute (120 base speed, speedy nature, and jacked Spd. EVs so this easy to throw out)
Calm Mind (Most opponents will switch once they get unwillingly scarfed and it boosts that regular `ol Sp. Atk for...)
Steel and Dark leads and other Pokes that are holding Choice Scarfs screw this set, but not many guys I've battled lead with Scarfed Pokes)
Crobat w/ Inner Focus
252 Spd, 252 Atk, 4 HP
Flying Gem (wonder why...lol)
Cross Poison (STAB, chance to poison, possible crit)
Acrobatics (Activates Flying Gem, for a super boosted 247.5 dmg STAB attack. Anything that doesnt resist or have massive bulk is pretty much toast)
Confuse Ray (doesnt miss and has a chance to work in conjunction with...)
Toxic (Why not?)
I NEVER have and never will use both of these Pokes on the same team, but they're good for countering guys that like to lead with fake-out.)