Gastrodon @ Sitrus Berry  
Ability: Storm Drain  
Level: 50  
EVs: 252 HP / 156 Def / 100 SpA  
Modest Nature  
IVs: 0 Atk  
- Scald  
- Yawn  
- Earth Power  
- Protect

Unown
Options:
- offensive: Ice Beam
- supportive: Recover, Clear Smog, Icy Wind
- items: Wiki Berry, Groundium Z, Expert Belt
- Nature: Quiet

Unown
Offensive calcs:
- 100+ SpA Gastrodon Earth Power vs. 252 HP / 4 SpD Mega Dhelmise: 102-122 (57.6 - 68.9%) -- guaranteed 2HKO
- 100+ SpA Gastrodon Earth Power vs. 0 HP / 0 SpD Mega Empoleon: 86-104 (54 - 65.4%) -- guaranteed 2HKO
Defensive calcs:
- 252 Atk Urshifu-Rapid Strike Close Combat vs. 252 HP / 156 Def Gastrodon: 114-135 (52.2 - 61.9%) -- guaranteed 3HKO after Sitrus Berry recovery