Rate my Gen-7 Uber Team!

Question

Poképaste: https://pokepast.es/3a00d6745a1b6cbc

Groudon-Primal @ Red Orb
Ability: Desolate Land
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Precipice Blades
- Stealth Rock
- Rock Tomb
- Rock Polish

Lugia @ Leftovers
Ability: Pressure
EVs: 252 HP / 4 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Defog
- Whirlwind
- Roost
- Aeroblast

Yveltal @ Leftovers
Ability: Dark Aura
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Tailwind
- Oblivion Wing
- Dark Pulse
- Heat Wave

Xerneas @ Power Herb
Ability: Fairy Aura
EVs: 248 HP / 252 SpA / 8 SpD
Modest Nature
IVs: 0 Atk
- Geomancy
- Moonblast
- Focus Blast
- Psyshock

Arceus @ Choice Band
Ability: Multitype
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Extreme Speed
- Earthquake
- Aqua Tail
- Zen Headbutt

Metagross-Mega @ Metagrossite
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Ice Punch
- Earthquake
- Meteor Mash
- Zen Headbutt

Comments

I would suggest Ice Beam over Aeroblast on Lugia, as it hits things like Zygarde, Arceus-Ground, and Salamence with super-effective damage. Aeroblast would really only hit Marshadow, and has low PP.

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Groudon doesn't need both Rock Tomb and Rock Polish, just Rock Tomb is fine and Rock Polish can be replaced with Fire Punch. Lugia should NEVER run Pressure. Multiscale is much, much better. Plus, it should be a bulky set with Toxic somewhere and not max Speed. Yveltal doesn't need Heat Wave in Gen 7, maybe try Sucker Punch instead. Choice Band Arceus is an interesting Choice, I would recommend Swords Dance + Extreme Speed + Earthquake + Shadow Claw, with Leftovers, Chople Berry, or Normalium Z. Metagross-Mega is severely outclassed by Necrozma-DM, consider replacing it.

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I used M-Metagross because of Tough Claws (though only two of them are boosted)

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btw, do you mind telling me why are you not running 88 speed evs on xern?

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Can anyone explain me how did Calyrex-Shadow come to Gen 7?

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If you're going to make Dusk Mane have Trick Room, you may as well make the entire team a Trick Room team; half the team is fairly fast or has a boosting move that makes it become fast.

Edit: I realize the improved team was suggested by an answer. In any case, you should consider replacing Trick Room with Autotomize.

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I'd rather ask you to answer this, but no probs.

This is the improved team after looking at the answer (not the exact one)

Groudon-Primal @ Red Orb
Ability: Desolate Land
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Precipice Blades
- Stealth Rock
- Rock Tomb
- Fire Punch

Lugia @ Leftovers
Ability: Multiscale
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Defog
- Whirlwind
- Roost
- Toxic

Xerneas @ Power Herb
Ability: Fairy Aura
EVs: 248 HP / 252 SpA / 8 SpD
Modest Nature
IVs: 0 Atk
- Geomancy
- Moonblast
- Hidden Power [Ground]
- Psyshock

Arceus @ Leftovers
Ability: Multitype
Adamant Nature
- Extreme Speed
- Earthquake
- Shadow Claw
- Zen Headbutt

Necrozma-Dusk-Mane @ Weakness Policy
Ability: Prism Armor
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
- Sunsteel Strike
- Photon Geyser
- Autotomize
- Earthquake

I saw in some answers that Yveltal doesn't do very good in Gen-7 Ubers, so Shall I use Marshadow?

Marshadow @ Focus Sash
Ability: Technician
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Spectral Thief
- Shadow Sneak
- Close Combat
- Ice Punch

(OR)

Yveltal @ Life Orb
Ability: Dark Aura
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Sucker Punch
- Oblivion Wing
- Dark Pulse
- U-turn

Answer 1

I like to go through mons one by one so let's do that
Groudon-Primal: why bring Rock tomb over a fire move which becomes stab (same type attack bonus) when it goes primal. I would suggest fire punch since Groudon didn't get another physical fire move until heat crash in gen 8
Lugia: nice set but like Kyogre pulse said ice beam>aeroblast.
Yveltal: this is the second Yveltal I've seen with leftovers which is not bad on it but if not heavy-duty boots then life orb for more damage which oblivion wing heals damage from life orb.
Xerneas: This is fine.
Arceus: I think Shadow Claw> Aqua Tail for ghost types.
Metagross-Mega: I would suggest Bullet Punch for priority instead of Ice Punch.

Overall its team is good but make those changes for it to be better.

Comments

Shall I consider replacing HP Ground over Focus Blast?

Aw that was why the opponents were OHKOing Lugia with ease!

Answer 2

Ok now that I saw a suggestion from eee01
let me post a team that could be a very good team for you:
https://pokepast.es/a5bc015bcf4eef00
Groudon-Primal @ Red Orb
Ability: Desolate Land
Shiny: Yes
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Rock Tomb
- Precipice Blades
- Fire Punch
- Stealth Rock

Lugia @ Leftovers
Ability: Multiscale
Shiny: Yes
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Defog
- Whirlwind
- Toxic
- Roost

Yveltal @ Life Orb
Ability: Dark Aura
Shiny: Yes
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Dark Pulse
- Oblivion Wing
- Sucker Punch
- Tailwind

Xerneas @ Power Herb
Ability: Fairy Aura
Shiny: Yes
EVs: 248 HP / 252 SpA / 8 SpD
Modest Nature
IVs: 0 Atk
- Moonblast
- Geomancy
- Focus Blast
- Psyshock

Necrozma-Dusk-Mane @ Solganium Z
Ability: Prism Armor
Shiny: Yes
EVs: 252 HP / 252 Atk / 4 SpA
Brave Nature
IVs: 0 Spe
- Sunsteel Strike
- Earthquake
- Trick Room
- Photon Geyser

Arceus @ Leftovers
Ability: Multitype
Shiny: Yes
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Swords Dance
- Extreme Speed
- Earthquake
- Shadow Claw

Comments

Lugia is a total taunt bait :(
If Necrozma faints early, then Trick Room may hinder other 'mons of my team.
Can I run Naive instead of Hasty on Yveltal?
Or shall I consider replacing Yveltal?