SS OU Rate my team pls

[P3492]

I'm new to competitive pokemon and found this team somewhere in a forum, but there wasn't anyone rating it or recommending any change, so if you see something to change, please say it
This is the team:

Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 248 HP / 8 Def / 252 SpD
Careful Nature
- Spikes
- Leech Seed
- Power Whip
- Protect

Excadrill @ Leftovers
Ability: Sand Rush
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Earthquake
- Iron Head
- Rapid Spin

Tyranitar @ Chople Berry
Ability: Sand Stream
Shiny: Yes
EVs: 252 HP / 168 Atk / 88 SpA
Brave Nature
IVs: 27 Spe
- Dark Pulse
- Stone Edge
- Fire Blast
- Thunder Wave

Rotom-Wash @ Choice Scarf
Ability: Levitate
EVs: 248 HP / 44 SpA / 216 Spe
Timid Nature
IVs: 0 Atk
- Hydro Pump
- Volt Switch
- Trick
- Will-O-Wisp

Ninetales-Alola @ Expert Belt
Ability: Snow Warning
Shiny: Yes
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Blizzard
- Avalanche
- Dazzling Gleam
- Calm Mind

Dragapult @ Choice Specs
Ability: Infiltrator
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Draco Meteor
- Fire Blast
- Shadow Ball
- Dragon Darts

 

[ironwater]

Hi P3492, welcome to Smogon! I am locking your RMT for the time being as the forum rules require that you provide at least three lines of descriptions for each Pokemon to explain their roles. Please read the rules carefully and look at Team Showcase to see the detail we require. PM me with updated descriptions, and I will be happy to unlock this. Also, feel free to PM me if you need help or have any question. Have a nice day!

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Tips to help get 3 lines of description

Why did you choose this Pokemon?
What do the EV spreads do and why do you have it?
What are all 4 moves for?