Salamence-Mega @ Salamencite  
Ability: Intimidate  
EVs: 44 HP / 252 Atk / 212 Spe  
Adamant Nature  
- Double-Edge  
- Dragon Dance  
- Roost  
- Earthquake / Facade
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Optional EV/IV(s):
- 252 Atk / 4 Def / 252 Spe  Adamant / Jolly Nature
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Salamence-Mega @ Salamencite  
Ability: Intimidate  
EVs: 64 HP / 252 Atk / 192 Spe  
Jolly Nature  
- Double-Edge  
- Defog  
- Roost  
- Facade
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Optional Move(s):
- Dragon Tail
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Salamence-Mega @ Salamencite  
Ability: Intimidate  
EVs: 248 HP / 124 Def / 136 Spe  
Impish Nature  
- Body Slam  
- Defog  
- Roost  
- Dragon Tail / Refresh
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Optional Move(s):
- Beak Blast
Optional EV/IV(s):
- 252 HP / 64 Def / 192 Spe  Jolly Nature  
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Overview:
Despite it gains nearly nothing useful moves in STABmon Uber, Mega Salamence is still retain its great traits. Its access to Dragon Dance and its Aerilate ability turns it into a good sweeper. Its high physical bulk and Intimidate prior to Mega lets it offensively check Primal Groudon, Ho-oh, Kartana and Mega Lucario. In addition, its access to Roost lets it stay healthy throughout the match and Defog to remove hazard. Its reliance on Double Edge as its primary move leaves it prone to being worn down and can sometimes forced to used Roost. Its 4x weakness to Ice-Type leaves it vulnerable to potential Ice coverage from pokemon it tries to check such as Hidden Power Ice from Primal Groudon and Marshadow.