SM OU Rate My Team?

[yharon]

Greninja @ Life Orb
Ability: Protean
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Gunk Shot
- Hidden Power [Fire]
- Extrasensory
- Hydro Pump

Gyarados-Mega @ Gyaradosite
Ability: Intimidate
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Dragon Dance
- Waterfall
- Crunch
- Earthquake

Volcarona @ Buginium Z
Ability: Flame Body
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Quiver Dance
- Fire Blast
- Bug Buzz
- Hidden Power [Ground]

Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 252 HP / 88 Def / 168 SpD
Relaxed Nature
- Spikes
- Leech Seed
- Gyro Ball
- Power Whip

Tapu Fini @ Leftovers
Ability: Misty Surge
EVs: 248 HP / 192 Def / 16 SpD / 52 Spe
Calm Nature
- Scald
- Moonblast
- Taunt
- Nature's Madness

Ninetales-Alola @ Light Clay
Ability: Snow Warning
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Aurora Veil
- Freeze-Dry
- Encore
- Moonblast

My first OU team. Thoughts and improvements?

 

[IronBullet]

Welcome to Smogon! I'm locking your RMT for the time being as the forum rules require that you provide in-depth descriptions for each Pokemon to explain their roles. Please read the rules carefully and take a look at Team Showcase to see the level of detail we require. PM me with updated descriptions and I'll be happy to unlock this.