Kyogre @ Leftovers  
Ability: Drizzle  
EVs: 252 HP / 240 Def / 16 Spe  
Bold Nature  
IVs: 0 Atk  
- Calm Mind  
- Scald  
- Rest  
- Ice Beam / Roar / Substitute / Sleep Talk

Eternatus @ Black Sludge / Heavy-Duty Boots
Ability: Pressure
EVs: 252 HP / 164 SpD / 92 Spe
Timid Nature
- Dynamax Cannon / Dragon Tail
- Mystical Fire / Flamethrower
- Toxic
- Recover

Eternatus @ Expert Belt
Ability: Pressure
EVs: 40 HP / 152 SpA / 252 SpD / 64 Spe
Modest Nature
IVs: 0 Atk
- Draco Meteor
- Flamethrower
- Recover
- Sludge Bomb