Ambipom

HP: 75
Attack: 100
Defense: 66
Special Attack: 60
Special Defense: 66
Attack: 100
Defense: 66
Special Attack: 60
Special Defense: 66
Speed: 115
Technician: Moves with a base power of 60 or less raise to 1.5 times.
Pickup: Has a 10% chance of finding and holding an item after battle. Will not work if this Pokémon is already holding an item. In Black & White, it allows for the user to pick up the item of its opponent or ally if they used up the item in battle.
Hidden Ability:
Pickup: Has a 10% chance of finding and holding an item after battle. Will not work if this Pokémon is already holding an item. In Black & White, it allows for the user to pick up the item of its opponent or ally if they used up the item in battle.
Hidden Ability:
Skill Link: Moves that attack 2-5 times always hit 5 times.
(Doubles) Fake Out
Ambipom @ Focus Sash/Normal Gem
Jolly
Technician
252 Atk, 252 Speed, 4 HP
Fake Out
Double Hit
Payback/Low Sweep
Taunt/Protect
Ambipom niche in this metagame is in the second fastest, and the most powerful Fake Out in the game. It is only out sped in Fake Outs by Weavile. Ambipom's ability, Technician, fits its move pool very well, with Double Hit and Fake Out doubling it power, if you factor in STAB also. Double Hit's ability to break Substitutes is valuable. Shadow Claw allows Ambipom to hit the Ghost types that Double Hit and Fake Out do not hit. The choice between Protect and Taunt is simply a choice of prediction, and the ability to shut supporters down.
Focus Sash is a good item to have, as Ambipom is extremely frail. However, Normal Gem pumps up Double Hit and Fake Out one notch further, and gives Ambipom an extreme boost in hitting power. The EVs are simple, maximizing Speed and Attack. Some other options for Ambipom are Fire Punch and Aerial Ace, as Fire Punch hits Grass types and Steel types like Abomasnow and Metagross, while Aerial Ace gets Technician boost and hits Bug, Fighting, and Grass types. Last Resort gets a mention for its pure power and the surprise factor. It should be run with Fake Out and possibly Protect, as it needs very few moves to use Last Resort.