Rate my Gen 7 Ubers team

Question

Arceus @ Leftovers
Ability: Multitype
EVs: 172 HP / 252 Atk / 84 Spe
Adamant Nature
- Extreme Speed
- Shadow Claw
- Swords Dance
- Recover

Marshadow @ Life Orb
Ability: Technician
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Spectral Thief
- Shadow Sneak
- Close Combat
- Rock Tomb

Xerneas @ Power Herb
Ability: Fairy Aura
Shiny: Yes
EVs: 172 Def / 252 SpA / 84 Spe
Modest Nature
IVs: 0 Atk
- Geomancy
- Thunder
- Moonblast
- Focus Blast

Gengar-Mega (M) @ Gengarite
Ability: Cursed Body
Shiny: Yes
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Hex
- Will-O-Wisp
- Taunt
- Sludge Wave

Groudon-Primal @ Red Orb
Ability: Desolate Land
Shiny: Yes
EVs: 252 Atk / 100 SpD / 156 Spe
Adamant Nature
- Rock Polish
- Swords Dance
- Precipice Blades
- Fire Punch

Necrozma-Dusk-Mane @ Solganium Z
Ability: Prism Armor
EVs: 36 HP / 252 Atk / 220 Spe
Adamant Nature
- Swords Dance
- Rock Polish
- Sunsteel Strike
- Earthquake

Comments

I think the move sets are great! One thing is that some people will get ragey at people who use lots of legendaries but that's not a problem for most players.

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I am guessing this is for singles, right?

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Gengar doesn't learn Sludge wave.