Trick Room take 8

Magearna @ Life Orb
Ability: Soul-Heart
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Ice Beam
- Flash Cannon
- Fleur Cannon
- Aura Sphere

Cresselia @ Mental Herb
Ability: Levitate
EVs: 248 HP / 40 Def / 220 SpD
Sassy Nature
IVs: 0 Atk / 0 Spe
- Trick Room
- Moonlight
- Moonblast
- Lunar Dance

Marowak-Alola @ Thick Club
Ability: Cursed Body
EVs: 248 HP / 252 Atk / 8 SpD
Adamant Nature
- Flare Blitz
- Shadow Bone
- Earthquake
- Thunder Punch

Mimikyu @ Ghostium Z
Ability: Disguise
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
IVs: 0 Spe
- Trick Room
- Swords Dance
- Play Rough
- Shadow Claw

Necrozma @ Mental Herb
Ability: Prism Armor
EVs: 252 HP / 252 Def / 4 SpA
Relaxed Nature
IVs: 0 Atk / 0 Spe
- Stealth Rock
- Trick Room
- Morning Sun
- Psychic

Crawdaunt @ Choice Band
Ability: Adaptability
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
IVs: 0 Spe
- Knock Off
- Aqua Jet
- Crabhammer
- Crunch