Eternatus @ Shed Shell  
Ability: Pressure  
EVs: 252 HP / 200 Def / 56 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Flamethrower  
- Toxic Spikes  
- Recover  

Rayquaza @ Choice Band  
Ability: Air Lock  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Dragon Ascent  
- Extreme Speed  
- V-create  
- Earthquake  

Zygarde @ Groundium Z  
Ability: Power Construct  
EVs: 12 HP / 216 Atk / 48 SpD / 232 Spe  
Adamant Nature  
- Dragon Dance  
- Thousand Arrows  
- Substitute  
- Protect  

Steelix @ Heavy-Duty Boots  
Ability: Sturdy  
EVs: 248 HP / 8 Atk / 252 Def  
Impish Nature  
- Stealth Rock  
- Earthquake  
- Body Press  
- Roar  

Serperior @ Leftovers  
Ability: Contrary  
EVs: 252 HP / 4 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Leech Seed  
- Leaf Storm  
- Glare  

Arceus-Rock @ Stone Plate  
Ability: Multitype  
EVs: 252 HP / 4 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Defog  
- Recover  
- Will-O-Wisp