Toxapex @ Black Sludge  
Ability: Regenerator  
Tera Type: Poison  
EVs: 248 HP / 248 Def / 12 Spe  
Impish Nature  
- Poison Jab  
- Toxic  
- Haze  
- Recover  

Greninja @ Choice Scarf  
Ability: Protean  
Tera Type: Water  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
- Ice Beam  
- Dark Pulse  
- Extrasensory  
- U-turn  

Ogerpon-Wellspring (F) @ Wellspring Mask  
Ability: Water Absorb  
Tera Type: Water  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Ivy Cudgel  
- Power Whip  
- Superpower  
- Swords Dance  

Keldeo @ Choice Specs  
Ability: Justified  
Tera Type: Water  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Surf  
- Secret Sword  
- Vacuum Wave  
- Flip Turn  

Primarina @ Leftovers  
Ability: Liquid Voice  
Tera Type: Water  
EVs: 208 HP / 204 Def / 96 Spe  
Bold Nature  
IVs: 0 Atk  
- Draining Kiss  
- Psychic Noise  
- Ice Beam  
- Calm Mind  

Swampert @ Heavy-Duty Boots  
Ability: Torrent  
Tera Type: Water  
EVs: 240 HP / 16 Def / 252 SpD  
Careful Nature  
IVs: 29 Spe  
- Earthquake  
- Stealth Rock  
- Mirror Coat  
- Flip Turn