This week:

Voltorb

Type: electric

#100

Soundproof: Voltorb is unaffected by Sound moves
Static: When a Pokémon makes contact with Voltorb, it has a 30% chance of being Paralyzed.

Evolution:

Voltorb Electrode

Old Pokemon of the week:

Metagross

Type: Steel/Psychic

#376

Ability:

Clear body: Opponent's Moves that Lower Stats will not work on Metagross

Evoltion:

Beldum Metang

Onix

Type: Rock/Ground

#095

Ability:

Rock Head: Onix receives no Re-Coil Damage
Sturdy: One-Hit KO Moves will not work

Evolotion:

Steelix

Lombre

Type: Water/Grass

#271

Ability:

Swift Swim: When Rain Dance is in effect, Lombre's Speed is Doubled.
Rain Dish: When Rain Dance is in effect, Lombre recovers 1/16th of it's max hit-points.

Evoltion:

Lotad Ludicolo

Shuckle

Type: Bug/Rock

#213

Ability:

Sturdy: One-Hit KO Moves will not work.
Gluttony: Shuckle Uses Held Berries quicker.

Evoltion:

None.

Scyther

Type: Bug/Flying

#123

Ability:

Swarm: When Scyther's HP Gets Low, It's Bug type attack's power is multiplied by 1.5
Technician: The power of Scyther's Weaker moves are increased

Evolotion:

Scizor

Makuhita

Type: Fighting

#296

Ability:
Thick Fat: Fire & Ice Type moves do 50% Damage on Makuhita
Guts: When Makuhita is inflicted with a status condition, it's attack is raised by 50%

Evolution:

Hariyama

Absol

Type: Dark

NO. #359

Abilitys:

Pressure: The Opponent's Moves against Absol use 2 PP instead of 1
Bad Luck: Foes Have A Higher Chance of performing a Critical Hit on Absol

Evolution:

None

Mantine

Type: Water & Flying

NO. #226.

Ability: Swift Swim & Water Absorb
Swift Swim: When Rain Dance is in effect, Mantine's Speed is Doubled.
Water Absorb: Mantine is healed by up to 25% of Max HP when hit by Water Attacks.

Evolution:

Mantyke