Fraxure @ Eviolite  
Ability: Mold Breaker  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Low Kick  
- Dual Chop / Outrage
- Poison Jab / Taunt

Fraxure @ Eviolite  
Ability: Mold Breaker  
EVs: 56 HP / 252 Atk / 200 Spe  
Adamant Nature  
- Swords Dance  
- Taunt / Poison Jab
- Outrage / Dual Chop
- Superpower  

Additional Move Options: Iron Tail, Aqua Tail, Dragon Claw
Additional Item Options: Dragonium-Z, Life Orb, Lum Berry
Notes: Fraxure has an amazing base attack and access to Swords Dance / Dragon Dance plus Mold Breaker which allows it to perform the role of a sweeper or wallbreaker. Coupled with its powerful Dragon STAB and coverage to deal with dragon-resist and -immune pokemon, it has a fairly easy time throwing off attacks to eliminate many pokemon in the tier.