eviolite dusclops
Dusclops @ Eviolite
Ability: Frisk
EVs: 252 HP / 160 Def / 96 SpD
Sassy Nature
- Pain Split
- Will-O-Wisp
- Night Shade
- Disable
he would work well. Plus your team needs a wall/support Pokemon badly
And diggersby is better from those 2
Diggersby @ Choice Scarf
Ability: Huge Power
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Earthquake
- Return
- Knock Off
- U-turn
or
Diggersby @ Focus Sash
Ability: Huge Power
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Return
- Earthquake
- Quick Attack
- Fire Punch
or even gengar to switch in on fighting attacks meant for aggron
Mega:
Gengar @ Gengarite
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Taunt
- Destiny Bond
- Sludge Wave
- Focus Blast
non mega:
Gengar @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Shadow Ball
- Sludge Wave
- Focus Blast
- Icy Wind