Usually, Smeargle run Baton Pass sets, or hazards sets:
Hazard setter:
Smeargle (M) @ Focus Sash
Trait: Own Tempo
EVs: 4 HP / 252 Def / 252 Spd
Timid Nature (+Spd, -Atk)
- Spore
- Spikes
- Magic Coat
- Stealth Rock
Baton Pass:
Smeargle (M) @ Focus Sash
Trait: Own Tempo
EVs: 252 HP / 4 Def / 252 Spd
Timid Nature (+Spd, -Atk)
- Spore
- Shell Smash
- Ingrain
- Baton Pass
Most Smeargle run no offensive EVs at all.
Pros: With Spore, you can almost get a guaranteed hazard setup, or Baton Pass.
Cons: They are many counters to these sets:
- Vital Spirit: Stops Spore
- Taunt: Shuts down Smeargle completely
- Hazards+ Priority: Once Smeargle's Sash is gone, it is easily revenge killed.
And just for fun:
FEAR! LEVEL ONE!
Smeargle (M) @ Focus Sash
Trait: Own Tempo
EVs: 252 Atk
IVs: 0 HP / 0 Def / 0 SDef / 0 Spd
Brave Nature (+Atk, -Spd)
- Spore
- Trick Room
- Endeavor
- Dragon Rage