A noobie is building a team for VGC

[Miguering]

Hey. It's my first time building a VGC team. I've tried some rental teams but now I've decided to build one by myself choosing some pokes I like.

This is what I've built, but I'm sure the team lacks of everything haha. So many dark types.

Murkrow @ Eviolite
Ability: Prankster
Level: 50
Tera Type: Ghost
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Foul Play
- Haze
- Tailwind
- Taunt

Gholdengo @ Metal Coat
Ability: Good as Gold
Level: 50
Tera Type: Steel
EVs: 20 HP / 4 Def / 244 SpA / 124 SpD / 116 Spe
Modest Nature
IVs: 0 Atk
- Make It Rain
- Protect
- Dazzling Gleam
- Shadow Ball

Meowscarada @ Choice Band
Ability: Protean
Level: 50
Tera Type: Grass
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Play Rough
- U-turn
- Flower Trick
- Knock Off

Garchomp @ Clear Amulet
Ability: Rough Skin
Level: 50
Tera Type: Ground
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Earthquake
- Protect
- Dragon Claw
- Rock Slide

Grimmsnarl @ Light Clay
Ability: Prankster
Level: 50
Tera Type: Fairy
- Fake Out
- Reflect
- Light Screen
- Spirit Break

Maushold @ Wide Lens
Ability: Technician
Level: 50
Tera Type: Normal
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Follow Me
- Protect
- Population Bomb
- Encore

https://pokepast.es/31d0015eebb16286

Things I wanna know:
1. How can I make my team work? I mean, I guess I need changes, so I'm open to change whatever. I like murkrow and Grimmsnarl so much.
2. Which EV spread is the best for Grimmsnarl?
3. What are the recommended leads or combos?

Hope you can help me, thanks!!

 

[Omastar68]

You should describe each Mon. I'd put expert belt over metal coat.

 

[ironwater]

Hi Miguering, 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!

How to PM someone on Smogon

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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?