Murkrow: The Staller
Item: Evolution Stone
Ability: Mischievous Heart
Taunt, Roost, Substitute, Toxic
Going first with status means you'll be safe with Sub-Roost. Taunt stops the foes from Taunting you. Toxic destroys the foe.
Scizor: Same as last Generation.
Item: None
Ability: Technician
Bullet Punch, Pursuit, Swords Dance, Acrobatics
Porygon-2: The Wall
Item: Evolution Stone
Ability: Trace
Recover, Thunderbolt, Ice Beam, Thunder Wave
Recover keeps Porygon2 alive longer, while Ice Beam and Thunderbolt make use of the fairly good Sp Attack (plus the chance of a x4 hit.) Thunder Wave is always helpful.
Politoed: Rain Bringer
Item: Leftovers
Ability: Drizzle
Ice Beam, Scald, Hypnosis, Rest
All that matters is Drizzle, everything else is dressing. Get Politoed in, then get it out ASAP.
Kingdra: The Rain Dance Sweeper
Item: Lum Berry
Ability: Swift Swim
Outrage, Dragon Pulse, Waterfall, Ice Beam
Poor movepool means two Dragon type attacks. I have no care for smogon, so I'm allowed this.
Tyranitar: Surprise Guest
Item: Leftovers
Ability: Unnerve
Stone Edge, Earthquake, Crunch, Dragon Dance
A Pokemon that is sure to throw the foe off guard. Bring it in after Porygon-2 has cleared the way with Thunder Wave.