Venusaur-Mega @ Venusaurite  
Ability: Thick Fat  
EVs: 248 HP / 84 Def / 176 SpD  
Calm Nature  
IVs: 0 Atk  
- Leech Seed  
- Synthesis  
- Toxic  
- Grass Knot  

Xerneas @ Choice Scarf  
Ability: Fairy Aura  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Moonblast  
- Geomancy  
- Sleep Talk  
- Aromatherapy  

Ho-Oh @ Leftovers  
Ability: Regenerator  
EVs: 252 HP / 204 Def / 36 SpD / 16 Spe  
Impish Nature  
- Sacred Fire  
- Brave Bird  
- Toxic  
- Recover  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Precipice Blades  
- Stone Edge  
- Swords Dance  
- Stealth Rock  

Naganadel @ Dragonium Z  
Ability: Beast Boost  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Draco Meteor  
- Nasty Plot  
- Sludge Wave  
- Flamethrower  

Arceus-Water @ Splash Plate  
Ability: Multitype  
EVs: 252 HP / 132 Def / 124 Spe  
Bold Nature  
IVs: 0 Atk  
- Ice Beam  
- Toxic  
- Defog  
- Recover