Few things.
- 252 EVs doesn't always max out a stat in LC.
- Never use a Choice Item with a status move unless you plan to use Trick. Go all offensive.
Machop (M) @ Choice Scarf
Trait: No Guard
EVs: 36 HP / 192 Atk / 36 Def / 236 Spd
Jolly Nature (+Spd, -SAtk)
- DynamicPunch
- Payback
- Ice Punch
- ThunderPunch
Carvanha (F) @ Life Orb
Trait: Speed Boost
EVs: 116 Atk / 236 SAtk / 156 Spd
Rash Nature (+SAtk, -SDef)
- Aqua Jet
- Crunch
- Ice Fang
- Surf / Hydro Pump
I highly recommend Gastly in this next spot. If you keep Aron, you'll have a huge Fighting weakness. Seeing that there are many Fighting Pokemon in LC, Gastly is perfect.
Gastly (M) @ Oran Berry
Trait: Levitate
EVs: 68 HP / 40 Def / 200 SAtk / 200 Spd
TImid Nature (+Spd, -Atk)
- Shadow Ball
- Substitute
- Hidden Power [Fighting]
- Hypnosis
Taillow (F) @ Flame Orb
Trait: Guts
EVs: 36 HP / 236 Atk / 236 Spd
Jolly Nature (+Spd, -Atk)
- Facade
- Pluck
- Quick Attack / U-turn
- Protect
Elekid (M) @ Choice Band
Trait: Vital Spirit
EVs: 252 Atk / 236 Spd
Adamant Nature (+Atk, -SAtk)
- ThunderPunch
- Ice Punch
- Fire Punch
- Cross Chop
trachy's set.
Porygon @ Eviolite
Trait: Trace
EVs: 236 HP / 196 Def / 76 SAtk
Bold Nature (+Def, -Atk)
- Tri Attack
- Shadow Ball
- Charge Beam
- Recover
Importable:
Machop (M) @ Choice Scarf
Trait: No Guard
EVs: 36 HP / 192 Atk / 36 Def / 236 Spd
Jolly Nature (+Spd, -SAtk)
- DynamicPunch
- Payback
- Ice Punch
- ThunderPunch
Carvanha (F) @ Life Orb
Trait: Speed Boost
EVs: 116 Atk / 236 SAtk / 156 Spd
Rash Nature (+SAtk, -SDef)
- Aqua Jet
- Crunch
- Ice Fang
- Surf
Gastly (M) @ Oran Berry
Trait: Levitate
EVs: 68 HP / 40 Def / 200 SAtk / 200 Spd
Timid Nature (+Spd, -Atk)
- Shadow Ball
- Substitute
- Hidden Power [Fighting]
- Hypnosis
Taillow (F) @ Flame Orb
Trait: Guts
EVs: 36 HP / 236 Atk / 236 Spd
Jolly Nature (+Spd, -Atk)
- Facade
- Pluck
- U-turn
- Protect
Elekid (M) @ Choice Band
Trait: Vital Spirit
EVs: 252 Atk / 236 Spd
Adamant Nature (+Atk, -SAtk)
- ThunderPunch
- Ice Punch
- Fire Punch
- Cross Chop
Porygon @ Eviolite
Trait: Trace
EVs: 236 HP / 196 Def / 76 SAtk
Bold Nature (+Def, -Atk)
- Tri Attack
- Shadow Ball
- Charge Beam
- Recover