Groudon-Primal @ Red Orb
Ability: Desolate Land
EVs: 252 HP / 112 Def / 144 SpD
Impish Nature
- Stealth Rock
- Precipice Blades
- Roar
- Toxic

 
Mewtwo-Mega-Y @ Mewtwonite Y
Ability: Unnerve
EVs: 40 Def / 216 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Calm Mind
- Psystrike
- Fire Blast
- Ice Beam

 
GOD. (Arceus-Water) @ Waterium Z
Ability: Multitype
EVs: 252 HP / 196 Def / 60 Spe
Bold Nature
IVs: 0 Atk
- Ice Beam
- Fire Blast
- Toxic
- Recover

 
Marshadow @ Choice Scarf
Ability: Technician
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Close Combat
- Spectral Thief
- Shadow Sneak
- Pursuit

 
Necrozma-Dusk-Mane @ Ultranecrozium Z
Ability: Prism Armor
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Stealth Rock
- Photon Geyser
- Dragon Pulse
- Power Gem

 
Xerneas @ Choice Specs
Ability: Fairy Aura
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Thunder
- Defog 
- Aromatherapy