Moody Power Trip Smeargle Sweep
Strat: Moody is Smeargle's hidden ability which increases a random stat by 2 stages and lowers another by 1 after each turn. This ability can be abused by stalling and using Power Trip, which increases BP by 20 for each stat boost.
Serperior's main objective is to use Glare to Paralyze the opponent, but it can also Taunt to prevent Status moves, and Dragon Tail to switch out Electric Types or setup sweepers. Grassy Terrain is set up before being knocked out to give extra recovery for Smeargle.
Smeargle then spams Substitute until the opponent is Paralyzed or switches out. This creates a safe turn to boost stats with Shell Smash. Smeargle starts attacking when Power Trip has enough BP. Spore puts non-Grass types to sleep, allowing extra turns for Moody boosts and Leftovers recovery.
Smeargle @ Leftovers
Ability: Moody
EVs: 40 HP / 252 Atk / 216 Spe
Adamant Nature
Substitute
Shell Smash
Spore
Power Trip
Serperior @ Focus Sash
Ability: Contrary
EVs: 252 HP / 4 Def / 252 Spe
Jolly Nature
Glare
Grassy Terrain
Taunt
Dragon Tail
Music: Symphony no. 4 in A 'Italian', Op. 90 - I. Allegro vivace by Felix Mendelssohn