Seismitoad @ Life Orb  
Ability: Swift Swim  
Level: 50  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
IVs: 0 SpA  
- Liquidation  
- Protect  
- Earthquake  
- Power Whip

Unown
Options: 
- offensive: Muddy Water, Hydro Pump, Earth Power, Poison Jab, Sludge Bomb
- items: Grassium Z, Groundium Z
- Nature: Modest

Unown
Offensive calcs:
- 252+ Atk Life Orb Seismitoad Liquidation vs. 4 HP / 0 Def Tapu Lele in Rain: 160-188 (109.5 - 128.7%) -- guaranteed OHKO
- 252+ Atk Life Orb Seismitoad Liquidation vs. 0 HP / 0 Def Spectrier in Rain: 188-224 (107.4 - 128%) -- guaranteed OHKO

Unown
Useful partners:
- Rain setter: Pelipper, Politoed, Mega Dhelmise, Mega Walrein
- others: Ludicolo