Don't break the core!

Steelix-Mega @ Steelixite
Ability: Sand Force
EVs: 252 HP / 240 Atk / 16 Def
Adamant Nature
- Heavy Slam
- Stealth Rock
- Earthquake
- Stone Edge

Malamar @ Tanga Berry
Ability: Contrary
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- Superpower
- Psycho Cut
- Rest
- Sleep Talk

Weezing @ Black Sludge
Ability: Levitate
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
- Will-O-Wisp
- Sludge Bomb
- Flamethrower
- Pain Split

Slurpuff @ Sitrus Berry
Ability: Unburden
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Drain Punch
- Play Rough
- Return
- Belly Drum

Liepard @ Black Glasses
Ability: Limber
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Encore
- U-turn
- Knock Off
- Thunder Wave

Rotom-Fan @ Choice Scarf
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Air Slash
- Thunderbolt
- Trick
- Volt Switch