Trapinch @ Groundium Z  
Ability: Arena Trap  
EVs: 252 HP / 252 Atk / 4 Def  
Brave Nature  
IVs: 0 Spe  
- Earthquake  
- Rock Slide  
- Crunch  
- Toxic  

Magearna @ Normalium Z  
Ability: Soul-Heart  
EVs: 252 HP / 40 Def / 216 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Heal Bell  
- Volt Switch  
- Trick Room  
- Fleur Cannon  

Healer (Cresselia) @ Mental Herb  
Ability: Levitate  
EVs: 252 HP / 76 Def / 180 SpD  
Sassy Nature  
IVs: 0 Atk  
- Trick Room  
- Toxic  
- Moonlight  
- Lunar Dance  

Necrozma-Dusk-Mane @ Weakness Policy  
Ability: Prism Armor  
EVs: 252 HP / 160 Atk / 40 SpD / 56 Spe  
Adamant Nature  
- Swords Dance  
- Rock Polish  
- Sunsteel Strike  
- Photon Geyser  

Kyogre-Primal @ Blue Orb  
Ability: Primordial Sea  
EVs: 252 HP / 160 Def / 96 SpD  
Modest Nature  
IVs: 0 Atk  
- Origin Pulse  
- Ice Beam  
- Thunder  
- Hidden Power [Fire]  

Ho-Ohhh (Arceus-Rock) @ Stone Plate  
Ability: Multitype  
EVs: 252 HP / 152 Def / 8 SpA / 96 SpD  
Bold Nature  
IVs: 0 Atk / 30 Spe  
- Judgment  
- Defog  
- Recover  
- Toxic