Buzzwole @ Leftovers  
Ability: Beast Boost  
EVs: 248 HP / 216 Def / 44 SpD  
Relaxed Nature  
IVs: 1 Spe  
- U-turn  
- Low Kick / Drain Punch  
- Roost  
- Toxic
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Optional Move(s):
- Sticky Web
- Ice Punch
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Overview:
Buzzwole's great physical bulk lets it check Marshadow, Zygarde-Complete, Mega Lucario, Diggersby and Kartana. Its access to STAB U-turn lets it pivot and bring its allies safely. Its low special bulk leaves it vulnerable to special attackers and a weakness to Fire, Fairy and Flying makes it prone to Primal Groudon, Xerneas, Ho-oh and Mega Salamence. It is also reliant on Toxic for damage against bulky pokemon.