OU Team

[TrainerNico]

Uhm, Is my team pretty balanced?

Vivillon@Focus Sash
Timid
Ability:Compound Eyes
4HP/252SpA/252Speed
-Bug Buzz
-Quiver Dance
-Sleep Powder
-Stun Spore

Greninja@Expert Belt
Timid
Ability:Protean
4HP/252SpA/252Speed
-Spikes
-Scald
-Ice Beam
-Extrasensory

Florges@(thinking at the moment)
Calm
Ability:Flower Veil
252HP/4SpA/252SpD
-Moonblast
-Wish
-Protect
-Aromatherapy

Avalugg@Leftovers
Relaxed
Ability:Sturdy
252HP/252Def/4Atk
-Avalanche
-Rapid Spin
-Recover
-Toxic

Garchomp@Yache Berry
Adamant
Ability:Sand Veil
4HP/252Atk/252Speed
-Dragon Claw
-Earthquake
-Stone Edge
-Swords Dance

Chandelure@leftovers
Modest
Ability:Flash Fire
4HP/252Spatk/252Speed
-Will-O-Wisp
-Pain Split
-Fire Blast
-Substitute

 

[PlatinumDude]

Uhm, Is my team pretty balanced?

Vivillon@Focus Sash
Timid
Ability:Compound Eyes
4HP/252SpA/252Speed
-Bug Buzz
-Quiver Dance
-Sleep Powder
-Stun Spore

Greninja@Expert Belt
Timid
Ability:Protean
4HP/252SpA/252Speed
-Spikes
-Scald
-Ice Beam
-Extrasensory

Florges@(thinking at the moment)
Calm
Ability:Flower Veil
252HP/4SpA/252SpD
-Moonblast
-Wish
-Protect
-Aromatherapy

Avalugg@Leftovers
Relaxed
Ability:Sturdy
252HP/252Def/4Atk
-Avalanche
-Rapid Spin
-Recover
-Toxic

Garchomp@Yache Berry
Adamant
Ability:Sand Veil
4HP/252Atk/252Speed
-Dragon Claw
-Earthquake
-Stone Edge
-Swords Dance

Chandelure@leftovers
Modest
Ability:Flash Fire
4HP/252Spatk/252Speed
-Will-O-Wisp
-Pain Split
-Fire Blast
-Substitute

Vivillon is essentially a worse Volcarona, IMO. It also has too much to do, and it's very frail. Compound Eyes Hurricane is one of its best niches and you're not really using it. I'd say that Galvantula is the better Compound Eyes abuser because it has more power and Speed behind it right off the bat:
-Sticky Web
-Thunder
-Bug Buzz
-Volt Switch/Giga Drain/Energy Ball/Hidden Power (Ice/Fire)
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Life Orb/Focus Sash
Ability: Compound Eyes

You have a bunch of Rock-weak Pokemon on you and that's not good. Even Avalugg is weak to Stealth Rock itself, so I'd find another Rapid Spinner/Defogger because of the last sentence I said. Donphan or Starmie are better Rapid Spinners in this case:

Donphan:
-Earthquake
-Rapid Spin
-Stealth Rock
-Ice Shard
Nature: Impish
EVs: 252 HP/252 Def/4 Spe
Item: Leftovers
Ability: Sturdy

Starmie:
-Hydro Pump/Surf
-Thunderbolt/Psyshock
-Ice Beam
-Rapid Spin
Nature: Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Leftovers/Life Orb
Ability: Natural Cure

or
-Scald
-Rapid Spin
-Psyshock/Ice Beam/Thunderbolt
-Recover
Nature: Timid
EVs: 248 HP/32 Def/4 SAtk/224 Spe
Item: Leftovers
Ability: Natural Cure

Extrasensory sees niche use on Greninja, so consider using U-turn (to scout for an attack; change the nature to Hasty/Naive if you do so) or Dark Pulse (to get past Jellicent). Considering Greninja's frailty, you can use Focus Sash instead to ensure you get a layer or two up.

A Jolly nature is better for Garchomp because while 102 Speed is good, it's not the best. It must outspeed as much things as possible.

Mono-Fire is terrible on Chandelure because it's walled by opposing Flash Fire users. Drop Will-o-Wisp for Shadow Ball, as it really needs the extra coverage.