Suggestions very much appreciated.
Aegislash @ King's Rock
Ability: Stance Change
Shiny: Yes
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- King's Shield
- Iron Head
- Shadow Claw
- Sacred Sword
Aggron @ Leftovers
Ability: Rock Head
Shiny: Yes
EVs: 4 HP / 252 Atk / 252 Def
Brave Nature
- Curse
- Head Smash
- Double-Edge
- Heavy Slam
Heracross @ Heracronite
Ability: Moxie
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Pin Missile
- Rock Blast
- Arm Thrust
- Bullet Seed
Kyogre-Primal @ Blue Orb
Ability: Primordial Sea
Shiny: Yes
EVs: 252 SpA / 252 SpD / 4 Spe
Calm Nature
IVs: 0 Atk
- Origin Pulse
- Ice Beam
- Thunder
- Protect
Deoxys-Speed @ Mental Herb
Ability: Pressure
EVs: 248 HP / 8 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Magic Coat
- Stealth Rock
- Spikes
- Taunt
Xerneas @ Fairium Z
Ability: Fairy Aura
Shiny: Yes
EVs: 248 HP / 252 SpA / 8 SpD
Modest Nature
IVs: 0 Atk
- Geomancy
- Moonblast
- Flash Cannon
- Hidden Power [Fire]
I use Z Geomancy when I first send outXxerneas and then sweep with it. Deoxys is my hazard setter and can also stop others from preparing to sweep with Taunt if they're using moves like Calm Mind. Kyogre is an amazing Special Tank/Attacker and is really useful. Skill Link Mega Heracross deals a lot of damage and can take care of Pokémon hiding behind substitutes. Aggron has an amazing defence stat and can deal a lot of damage with no recoil thanks to Rock Head. Aegislash is my favourite as it can go from a tank to an attacker and back instantly, making it very strong.