OU team help.

[ArmswieldTheHero]

My first real team, please judge it harshly.

Lead:
Ferrothorn @ rocky helmet
Ability: Iron Barbs
EVs: 252 HP / 252 Sp Def / 4 Atk
Brave Nature
- Swords dance
- Leech Seed
- Power Whip
- Protect
I chose ferrothorn for his bulk on both sides and diverse move pool.
His role is a staller/mixed wall.
Pretty simple moveset; leech seed, protect, swords dance, protect, power whip. Then just loop protect and power whip.

Coverage:
Lampent @ sitrus berry
Ability: Flash Fire
EVs: 252 SpA / 252 Spe / 4 Def
Timid Nature
- Flamethrower
- Shadow Ball
- Energy Ball
- Protect
I chose chandelure because he can switch in on ferrothorns two weaknesses.
His role on the team is to cover ferrothorn.
His moveset is designed to have the widest range of types to hit and ohko/2hko threats to ferrothorn.

Physical tank:
Doublade @ Eviolite
Ability: No Guard
EVs: 252 HP / 4 Atk / 252 SpD
Sassy Nature
- Sacred Sword
- Shadow Claw
- Protect
- Shadow sneak
I chose doublade because of his huge physical bulk.
His moveset is simple, use protect to scout attacks, then hit with stab shadow claw or super effective sacred sword, finish with shadow sneak.

Sp. Striker:
Gengar @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Shadow Ball
- Sludge Wave
- Psychic
- Destiny Bond
I chose gengar for his high speed and special attack stats.
His role is as a revenge killer.
His moveset is made to score stabs and super effective a against a wide range if foes.


Aerodactyl @ Aerodactylite
Ability: Pressure
EVs: 4HP / 252 Atk / 252 Spe
Jolly Nature
- Hone Claws
- Stone Edge
- Fire Fang
- Aerial Ace

I chose aerodactly because of his attack and insane speed stats.
His role is that of a sweeper.
If possible setting up hone claws Is important, after that sweep with the best attacks for the specific pokemon.

And of course our lovely and irritating destroyer of worlds, the incredibly adorable; Togekiss.

Togekiss @ Kings Rock
Ability: Serene Grace
EVs: 252 HP / 4 SpA / 252 SpD
Calm Nature
- Roost
- Air Slash
- Thunder Wave
- light screen
I chose togekiss for her special bulk and diverse move pool on top of the ability "serene grace"
Her role is to tank threats by Paralyzing and then slamming air slash for the flinch, light screen for additional sp. Defense and roost for a reliable heal.

Tell me how bad I blundered, it held pretty well in online random matchups.

 

[PlatinumDude]

Ferrothorn should be used for walling purposes only. It has little to no room for setting up Swords Dance and it really likes having its support options handy:
-Stealth Rock
-Leech Seed
-Gyro Ball/Thunder Wave
-Power Whip/Protect
Nature: Relaxed
EVs: 252 HP/88 Def/168 SDef
Item: Leftovers/Shed Shell
Ability: Iron Barbs

You appear to have a pretty bad weakness to Bisharp, as half the team is comprised of Ghosts. Bisharp can Knock Off Doublade's Eviolite and slam Chandelure and Gengar hard with Sucker Punch. Doublade functions best on stall teams to handle Mega Gardevoir and Mega Heracross better. For these reasons, I'd remove Chandelure and Doublade and replace them with Mandibuzz (to provide Defog support for your Stealth Rock-weak Pokemon), Azumarill (for a better check against Dark Pokemon) or Therian Landorus (for a good check against physically-oriented targets):

Mandibuzz:
-Foul Play
-Roost
-Taunt/Whirlwind
-Defog
Nature: Bold
EVs: 248 HP/136 Def/108 SDef/16 Spe
Item: Leftovers
Ability: Overcoat

Azumarill:
-Waterfall
-Play Rough
-Aqua Jet
-Knock Off/Superpower
Nature: Adamant
EVs: 164 HP/252 Atk/92 Spe (Choice Band) or 240 HP/252 Atk/16 SDef (Assault Vest)
Item: Choice Band/Assault Vest
Ability: Huge Power

or
-Belly Drum
-Aqua Jet
-Play Rough
-Knock Off
Nature: Adamant
EVs: 92 HP/252 Atk/164 Spe
Item: Sitrus Berry
Ability: Huge Power

Therian Landorus
-Earthquake
-Stone Edge
-U-turn
-Knock Off/Superpower/Explosion
Nature: Jolly
EVs: 252 Atk/24 Def/232 Spe
Item: Choice Scarf

or
-Stealth Rock
-Earthquake
-U-turn
-Stone Edge/Rock Slide/Knock Off
Nature: Impish
EVs: 252 HP/248 Def/8 Spe
Item: Leftovers

or
-Swords Dance
-Rock Polish
-Earthquake
-Stone Edge
Nature: Adamant
EVs: 56 HP/252 Atk/200 Spe
Item: Leftovers

While Mega Aerodactyl's bulk is rather decent, its common weaknesses can pose problems for using setup moves. It's better off all-out attacking:
-Stone Edge
-Aerial Ace
-Fire Fang/Earthquake
-Aqua Tail/Ice Fang
Nature: Jolly
EVs: 248 Atk/44 Def/216 Spe
Item: Aerodactylite

Take note that King's Rock doesn't stack with flinch moves, so Togekiss should use Leftovers:
-Thunder Wave
-Air Slash
-Defog/Heal Bell/Dazzling Gleam/Aura Sphere/Flamethrower
-Roost
Nature: Calm/Bold
EVs: 248 HP/8 Def/252 SDef (Calm) or 248 HP/252 Def/8 SDef (Bold)
Item: Leftovers
Ability: Serene Grace

 

[ArmswieldTheHero]

Ferrothorn should be used for walling purposes only. It has little to no room for setting up Swords Dance and it really likes having its support options handy:
-Stealth Rock
-Leech Seed
-Gyro Ball/Thunder Wave
-Power Whip/Protect
Nature: Relaxed
EVs: 252 HP/88 Def/168 SDef
Item: Leftovers/Shed Shell
Ability: Iron Barbs

You appear to have a pretty bad weakness to Bisharp, as half the team is comprised of Ghosts. Bisharp can Knock Off Doublade's Eviolite and slam Chandelure and Gengar hard with Sucker Punch. Doublade functions best on stall teams to handle Mega Gardevoir and Mega Heracross better. For these reasons, I'd remove Chandelure and Doublade and replace them with Mandibuzz (to provide Defog support for your Stealth Rock-weak Pokemon), Azumarill (for a better check against Dark Pokemon) or Therian Landorus (for a good check against physically-oriented targets):

Mandibuzz:
-Foul Play
-Roost
-Taunt/Whirlwind
-Defog
Nature: Bold
EVs: 248 HP/136 Def/108 SDef/16 Spe
Item: Leftovers
Ability: Overcoat

Azumarill:
-Waterfall
-Play Rough
-Aqua Jet
-Knock Off/Superpower
Nature: Adamant
EVs: 164 HP/252 Atk/92 Spe (Choice Band) or 240 HP/252 Atk/16 SDef (Assault Vest)
Item: Choice Band/Assault Vest
Ability: Huge Power

or
-Belly Drum
-Aqua Jet
-Play Rough
-Knock Off
Nature: Adamant
EVs: 92 HP/252 Atk/164 Spe
Item: Sitrus Berry
Ability: Huge Power

Therian Landorus
-Earthquake
-Stone Edge
-U-turn
-Knock Off/Superpower/Explosion
Nature: Jolly
EVs: 252 Atk/24 Def/232 Spe
Item: Choice Scarf

or
-Stealth Rock
-Earthquake
-U-turn
-Stone Edge/Rock Slide/Knock Off
Nature: Impish
EVs: 252 HP/248 Def/8 Spe
Item: Leftovers

or
-Swords Dance
-Rock Polish
-Earthquake
-Stone Edge
Nature: Adamant
EVs: 56 HP/252 Atk/200 Spe
Item: Leftovers

While Mega Aerodactyl's bulk is rather decent, its common weaknesses can pose problems for using setup moves. It's better off all-out attacking:
-Stone Edge
-Aerial Ace
-Fire Fang/Earthquake
-Aqua Tail/Ice Fang
Nature: Jolly
EVs: 248 Atk/44 Def/216 Spe
Item: Aerodactylite

Take note that King's Rock doesn't stack with flinch moves, so Togekiss should use Leftovers:
-Thunder Wave
-Air Slash
-Defog/Heal Bell/Dazzling Gleam/Aura Sphere/Flamethrower
-Roost
Nature: Calm/Bold
EVs: 248 HP/8 Def/252 SDef (Calm) or 248 HP/252 Def/8 SDef (Bold)
Item: Leftovers
Ability: Serene Grace

Thanks a million, I owe you one!