Rate/Improve my team Please

Question

Ok so here's my team plus roles. Any advice would be greatly appreciated. Bonus points for coming up with a. Name as well

Kyurem-Black @ Choice Scarf
Ability: Teravolt
EVs: 20 Atk / 252 SpA / 236 Spe
Mild Nature
- Ice Beam
- Fusion Bolt
- Earth Power
- Iron Head
Fast Special Sweeper

Hippowdon @ Leftovers
Ability: Sand Stream
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Earthquake
- Stealth Rock
- Slack Off
- Stone Edge
Wall/stealth rock

Metagross @ Metagrossite
Ability: Clear Body
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Rock Polish
- Meteor Mash
- Zen Headbutt
- Hammer Arm
Tank/Physical Sweeper

Sylveon @ Leftovers
Ability: Pixilate
EVs: 252 HP / 4 SpA / 252 SpD
Calm Nature
- Wish
- Heal Bell
- Protect
- Hyper Voice
Cleric& bonus fairy typing

Mew @ Leftovers
Ability: Synchronize
EVs: 252 HP / 220 SpD / 36 Spe
Careful Nature
- Defog
- Soft-Boiled
- Taunt
- Knock Off
Defogger

Keldeo @ Choice Scarf
Ability: Justified
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Scald
- Secret Sword
- Hydro Pump
- Icy Wind
Fast Special Sweeper

If you'd like more detailed descriptions just ask. Thanks for the help.

Comments

Iron Head isn't really necessary since yeah you have Metagross. Roost could work as Kyurem B scares out a lot of  other mons or potentially sub but you lose your longevity

Answer 1

Kyurem-B is a Fast Mixed Sweeper :)
I honestly don't think you need Rock Polish on Mega Metagross. Just run a Jolly nature and replace it with Bullet Punch; gives priority, and you're still pretty fast.
*You don't have any Defense-oriented Pokémon. You could probably replace Mew with Skarmory, which gives you a Flying type while also keeping Defog (and gives you another Pokémon to work in Sandstorm!).

Skarmory @ Leftovers / Rocky Helmet
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 SpD
Impish Nature
- Roost
- Defog
- Brave Bird
- Whirlwind

Also- your team is vulnerable to setup sweepers like Mega Altaria or Excadrill; which Skarmory's Whirlwind can help a little with. Preferably, get rid of one of your scarfers and replace it for a supporting Pokémon that can Thunder Wave (Ferrothorn / Clefable) or Will-o-Wisp (Sableye / Rotom-W).

Hope that helps! (And I'm not very creative when it comes to names. Sorry!)

Comments

A few comments/questions- 1) whilst Skarmory is a good options, I have two worries which are that I will have no one to use taunt and will leave myself incredibly weak against both psychic and ghost types. What should I do about that?
2) Which scarcer should I remove? I'm thinking that Kyurem-B could be removed for Rotom-W as it would have basically the same attacking bonuses against the same types. However, as hippowdon is fairly defensive would it be too much defence in my team? However I do like the idea of a second defensive wall/annoyer.
Thanks for your original input. I'm interested to see what you think.

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I'm sending my friend Srw3 to help. He'll put you on track.

Answer 2

Try Life Orb Kyurem B instead of Scarf. Keep Scarf Keldeo. You don't have a whole lot of Pokemon that work well in sand either so idk about Hippowdon. Mew is solid, you don't need to change that. Maybe put Will-O-Wisp over Taunt or Defog but that's just preference. Where on the ladder are you playing at as well? Rock Polish Metagross won't make a difference if you're low ladder (below 1500) and you can easily just replace that for Pursuit or Thunder Punch (Starmie)

Comments

Thanks a lot. I've fixed up metagross, and Kyurem is now running a life orb, however do you think I should replace a move of his with outrage/dragon claw for a dragon type move? Or, given he's running a life orb, even roost? Or should I just keep iron head, for fairy type damage? Thanks

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I mean you already have Megagross which is a solid fairy killer, you don't need Iron Head tbh. Dragon Claw could be beneficial just because it scares out a lot with that and has amazing neutral hitting power. You have recovery on 3 of your mons already, I don't think Roost is needed.