Landorus-Therian (M) @ Choice Scarf  
Ability: Intimidate  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant / Jolly Nature  
- Precipice Blades  
- Dragon Ascent  
- U-turn  
- Explosion
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Optional Move(s):
- Knock Off
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Landorus-Therian (M) @ Leftovers  
Ability: Intimidate  
EVs: 248 HP / 252 Def / 8 SpD  
Impish Nature  
- Precipice Blades  
- Beak Blast  
- U-turn   
- Shore Up
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Optional Move(s):
- Stealth Rock
- Spikes
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Overview:
Landorus-Therian is a decent Choice Scarf user with a great offensive STAB combination alongside U-turn to regain momentum. Outside of this, its Intimidate ability helps it blanket check physical attackers such as Marshadow, Mega Lucario and Necrozma-Dusk-Mane. However, Its average Speed tier forces its offensive set to run Choice Scarf. In addition, its middling bulk leaves it reliant on Attack drops from Intimidate and is vulnerable to Ice coverage by the pokemon its supposed to check.