Miraidon @ Magnet  
Ability: Hadron Engine  
Level: 50  
Tera Type: Electric  
EVs: 252 HP / 68 Def / 76 SpA / 4 SpD / 108 Spe  
Modest Nature  
- Electro Drift  
- Draco Meteor  
- Volt Switch  
- Protect  
252+ Atk Groudon Precipice Blades vs. 252 HP / 68 Def Miraidon: 174-206 (84 - 99.5%) -- guaranteed 2HKO
252 SpA Calyrex-Shadow Astral Barrage vs. 252 HP / 4 SpD Miraidon: 81-96 (39.1 - 46.3%) -- guaranteed 3HKO
Speed stat: 169 (Outspeeds 252+ Lando-I)

Iron Valiant @ Focus Sash  
Ability: Quark Drive  
Level: 50  
Tera Type: Ghost  
EVs: 252 Atk / 4 SpA / 252 Spe  
Naive Nature  
- Close Combat  
- Spirit Break  
- Icy Wind  
- Wide Guard  
4 SpA Iron Valiant Icy Wind vs. 4 HP / 0 SpD Landorus: 88-108 (53.3 - 65.4%) -- guaranteed 2HKO
Speed stat: 184
Speed stat (in terrain): 276

Ogerpon-Wellspring (F) @ Wellspring Mask  
Ability: Water Absorb  
Level: 50  
Tera Type: Water  
EVs: 252 HP / 76 Atk / 20 Def / 4 SpD / 156 Spe  
Adamant Nature  
- Ivy Cudgel  
- Horn Leech  
- Follow Me  
- Spiky Shield  
76+ Atk Wellspring Mask Ogerpon-Wellspring Horn Leech vs. 252 HP / 4 Def Groudon: 104-126 (50.2 - 60.8%) -- guaranteed 2HKO
252+ SpA Kyogre Thunder vs. 252 HP / 4 SpD Ogerpon-Wellspring: 79-93 (42.2 - 49.7%) -- guaranteed 3HKO
Speed stat: 150 (Outspeeds 252 Urshifu)

Gholdengo @ Leftovers  
Ability: Good as Gold  
Level: 50  
Tera Type: Water  
EVs: 244 HP / 84 Def / 84 SpA / 28 SpD / 68 Spe  
Modest Nature  
IVs: 0 Atk  
- Make It Rain  
- Shadow Ball  
- Nasty Plot  
- Protect  
+1 252 Atk Zacian-Crowned Behemoth Blade vs. 244 HP / 84 Def Gholdengo: 67-80 (34.7 - 41.4%) -- 72.8% chance to 3HKO after Leftovers recovery
252+ Atk Calyrex-Ice High Horsepower vs. 244 HP / 84 Def Tera Water Gholdengo: 68-80 (35.2 - 41.4%) -- 73.9% chance to 3HKO after Leftovers recovery
252 SpA Hadron Engine Miraidon Electro Drift vs. 244 HP / 28 SpD Gholdengo in Electric Terrain: 159-187 (82.3 - 96.8%) -- guaranteed 2HKO after Leftovers recovery
252+ SpA Kyogre Thunder vs. 244 HP / 28 SpD Tera Water Gholdengo: 160-190 (82.9 - 98.4%) -- guaranteed 2HKO after Leftovers recovery
252+ SpA Flutter Mane Shadow Ball vs. 244 HP / 28 SpD Gholdengo: 162-192 (83.9 - 99.4%) -- guaranteed 2HKO after Leftovers recovery
Speed stat: 113 (Outspeeds -1 252+ Lando-I)

Landorus-Therian @ Assault Vest  
Ability: Intimidate  
Level: 50  
Tera Type: Flying  
EVs: 12 HP / 132 Atk / 4 Def / 108 SpD / 252 Spe  
Jolly Nature  
- Stomping Tantrum  
- Tera Blast  
- Rock Tomb  
- U-turn  
252 SpA Life Orb Hadron Engine Miraidon Draco Meteor vs. 12 HP / 108 SpD Assault Vest Landorus-Therian: 140-165 (84.3 - 99.3%) -- guaranteed 2HKO
252 SpA Mystic Water Kyogre Water Spout (150 BP) vs. 12 HP / 108 SpD Assault Vest Tera Flying Landorus-Therian in Rain: 135-159 (81.3 - 95.7%) -- guaranteed 2HKO
Speed stat: 157 (Outspeeds 252+ Groudon/Kyogre)

Chi-Yu @ Choice Scarf  
Ability: Beads of Ruin  
Level: 50  
Tera Type: Ground  
EVs: 84 HP / 4 Def / 180 SpA / 4 SpD / 236 Spe  
Timid Nature  
IVs: 0 Atk  
- Heat Wave  
- Overheat  
- Dark Pulse  
- Tera Blast  
252+ Atk Calyrex-Ice Glacial Lance vs. 84 HP / 4 Def Chi-Yu: 59-70 (41.8 - 49.6%) -- guaranteed 3HKO
252 SpA Choice Specs Calyrex-Shadow Astral Barrage vs. 84 HP / 4 SpD Chi-Yu: 58-69 (41.1 - 48.9%) -- guaranteed 3HKO
Speed stat: 165 (Outspeeds 252+ Urshifu)
Speed stat (w/ scarf): 247