+ Brave Bird
Stats and Typing: Unfezant has pretty nice offensive stats, at 105 Attack and 93 Speed. And it's a Flying-type!
Ability: Super Luck means crits would be more common (and also would mean more recoil
)
Design: It is a BIRD for goodness' sake! Why can Crobat, which is a bat, and Blaziken, which is a flightless bird, get it when an actual FLYING BIRD cannot?!
Need: Unfezant's physical flying moves are Aerial Ace, Fly, Pluck and Sky Attack, none of which is popular competitively. At the moment Unfezant only has Return to show any offensive prowess. Although he would still be walled by Rock- and Steel-types, Brave Bird would already be a big improvement.
+ Drill Run, Close Combat
Stats and Typing:110 Attack and 100 Speed. Sounds like good physical stats to me.
Ability: Unfortunately, this guy's abilities are nigh-on useless
Design: A bit sketchy, but I can imagine him using his three heads to achieve something similar to drilling, while I can also imagine it bashing its heads into and kicking an opponent to perform Close Combat.
Need: Dodrio needs coverage on Steel- and Rock-types. He has great potential, just not great moves.
Other: When I heard BW2 had a Drill Run tutor I was hoping that Dodrio would get the kind of move he's always wanted.
+ Shadow Sneak
Stats and Typing: Terrible speed and good attack means STAB priority would be quite useful.
Ability: Unfortunately none of Golurk's abilities benifit Shadow Sneak.
Design: Being the ghost that it is, it should be able to hide in the shadows to strike.
Need: With its low speed and many weaknesses, Golurk really needs priority to even be able to have a chance against some pokemon.
+ Quick Attack
Stats and Typing: Ambipom has great speed and nice attack; priority would be nice for those few that are faster though.
Ability: Technician Quick Attack would have the same Base Power as Scizor's Bullet Punch. Enough said.
Design: Ambipom looks nimble enough to perform Quick Attack (and it can learn Agility).
Need: With Mienshao in UU Ambipom is no outclassed as a Fake Out user. However, with Quick Attack is has STAB Technician-boosted priority that can be used without switching out.
On a side note, is there anywhere where it is possible to play Theorymons?