Substitute (Raichu) @ Leftovers / Petaya Berry
Ability: Static  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Thunderbolt  
- Substitute  
- Hidden Power [Ice / Grass / Ground] / Toxic 
- Toxic / Surf / Encore / Thunder Wave / Protect
Offensive Utility (Raichu) @ Leftovers / Lum Berry  
Ability: Static  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Thunderbolt  
- Hidden Power [Ice / Grass / Ground]
- Surf / Toxic / Encore
- Thunder Wave / Encore
Wish (Raichu) @ Leftovers  
Ability: Static  
EVs: 252 HP / 240 SpD / 16 Spe  
Calm Nature  
- Thunderbolt  
- Wish  
- Protect
- Seismic Toss / Toxic / Thunder Wave / Encore

Mixed Attacker (Rapidash) @ Silk Scarf / Lum Berry / Choice Band  
Ability: Flash Fire  
EVs: 252 Atk / 4 SpA / 252 Spe  
Naive Nature  
- Double-Edge  
- Overheat / Fire Blast 
- Hidden Power [Ground / Grass]  
- Quick Attack / Return
Sunny Day (Rapidash) @ Lum Berry / Charcoal  
Ability: Flash Fire  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive / Timid Nature  
- Sunny Day  
- Fire Blast  
- Solar Beam  
- Hidden Power [Ground / Electric]
SubToxic (Rapidash) @ Leftovers  
Ability: Flash Fire  
EVs: 8 HP / 248 SpA / 252 Spe  
Timid Nature
- Flamethrower / Fire Blast
- Substitute  
- Toxic  
- Protect / Hidden Power [Electric / Grass / Water]

Offensive (Politoed) @ Leftovers / Lum Berry
Ability: Damp / Water Absorb
EVs: 136 HP / 4 Def / 252 SpA / 20 SpD / 96 Spe  
Modest Nature  
- Surf / Hydro Pump
- Ice Beam / Psychic
- Hidden Power [Electric] / Psychic  
- Counter / Toxic / Substitute / Psychic
Defensive (Politoed) @ Leftovers  
Ability: Damp
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
- Surf
- Seismic Toss
- Rest / Protect
- Toxic / Sleep Talk

Offensive Bulk Up (Poliwrath) @ Leftovers / Lum Berry  
Ability: Damp / Water Absorb
EVs: 252 HP / 160 Atk / 96 Spe  
Adamant Nature  
- Bulk Up  
- Brick Break  
- Hidden Power [Ghost / Rock / Flying]  
- Earthquake / Substitute
Bulk Up + Rest (Poliwrath) @ Leftovers / Chesto Berry  
Ability: Damp  
EVs: 252 HP / 88 Def / 168 SpD  
Careful Nature  
- Bulk Up  
- Brick Break  
- Hidden Power [Ghost / Rock / Flying]  
- Rest
Belly Drum (Poliwrath) @ Salac Berry  
Ability: Damp / Water Absorb
EVs: 28 HP / 252 Atk / 20 Def / 208 Spe  
Adamant Nature  
IVs: 30 SpA / 30 SpD / 30 Spe  
- Belly Drum    
- Substitute  
- Brick Break / Earthquake 
- Hidden Power [Flying / Rock]

Special Attacker (Poliwrath) @ Leftovers  
Ability: Damp / Water Absorb  
EVs: 160 HP / 252 SpA / 96 Spe  
Modest Nature  
- Surf / Hydro Pump  
- Psychic / Ice Beam 
- Ice Beam / Hidden Power [Electric] 
- Toxic / Counter / Focus Punch

Defensive (Poliwrath) @ Leftovers  
Ability: Damp  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
- Surf  
- Seismic Toss  
- Rest / Protect 
- Sleep Talk / Toxic

Defensive (Victreebel) @ Leftovers  
Ability: Chlorophyll  
EVs: 252 HP / 176 Def / 60 SpD / 20 Spe  
Impish Nature  
- Sludge Bomb  
- Hidden Power [Ground / Grass] / Swords Dance / Encore
- Stun Spore / Sleep Powder / Swords Dance / Encore  
- Synthesis

Swords Dance (Victreebel) @ Lum Berry / Leftovers / Salac Berry
Ability: Chlorophyll  
Hidden Power: Ground  
EVs: 252 Atk / 40 SpD / 216 Spe  
Adamant / Jolly Nature  
- Swords Dance  
- Sludge Bomb  
- Hidden Power [Ground]  
- Sleep Powder / Encore / Substitute
Sunny Day (Victreebel) @ Lum Berry  
Ability: Chlorophyll  
EVs: 252 SpA / 36 SpD / 220 Spe  
Modest / Timid Nature
- Sunny Day
- Solar Beam  
- Hidden Power [Fire]  
- Sleep Powder / Encore
(Mixed set with Soft Sand HP Ground Sludge Bomb is also possible)

Choice Band (Victreebel) @ Choice Band  
Ability: Chlorophyll  
Hidden Power: Ground  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant / Jolly Nature  
- Sludge Bomb  
- Hidden Power [Ground]  
- Double-Edge  
- Body Slam / Hyper Beam

Swords Dance (Meganium) @ Leftovers / Lum Berry / Salac Berry  
Ability: Overgrow  
Hidden Power: Rock  
EVs: 76 HP / 252 Atk / 180 Spe  
Adamant Nature  
IVs: 30 SpA / 30 SpD / 30 Spe  
- Swords Dance  
- Earthquake  
- Hidden Power [Flying / Rock]  
- Synthesis / Substitute / Ancient Power
Defensive (Meganium) @ Leftovers
Ability: Overgrow
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Leech Seed
- Razor Leaf
- Body Slam / Hidden Power [Fire] / Counter
- Synthesis

Support (Xatu) @ Leftovers  
Ability: Early Bird / Synchronize  
EVs: 252 HP / 4 SpA / 252 Spe  
Timid Nature  
- Psychic  
- Thunder Wave / Toxic
- Reflect / Wish / Haze
- Rest / Refresh

Calm Mind (Xatu) @ Leftovers / Lum Berry / No Item / Salac Berry  
Ability: Synchronize / Early Bird  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Psychic  
- Hidden Power [Fire] / Thief  
- Thunder Wave / Rest / Substitute / Endure
- Calm Mind
Choice Band (Xatu) @ Choice Band  
Ability: Synchronize  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly / Adamant Nature  
- Drill Peck  
- Hidden Power [Ground]  
- Shadow Ball  
- Quick Attack / Giga Drain

Offensive Utility (Banette) @ Leftovers  
Ability: Insomnia  
EVs: 116 HP / 252 Atk / 140 Spe  
Adamant Nature  
- Shadow Ball  
- Hidden Power [Fighting]  
- Will-O-Wisp / Thunder Wave 
- Taunt / Substitute / Thunder Wave / Destiny Bond

Salac Berry (Banette) @ Salac Berry  
Ability: Insomnia  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant / Jolly Nature  
- Shadow Ball  
- Hidden Power [Fighting]  
- Destiny Bond / Will-O-Wisp / Thunder Wave
- Endure / Substitute

Choice Band (Banette) @ Choice Band  
Ability: Insomnia
EVs: 252 Atk / 4 Def / 252 Spe
Adamant / Jolly Nature  
- Shadow Ball  
- Hidden Power [Fighting]
- Double-Edge  
- Body Slam

All-out Attacker (Hitmonchan) (M) @ Leftovers / Choice Band  
Ability: Keen Eye  
EVs: 88 HP / 252 Atk / 168 Spe  
Adamant Nature  
- Sky Uppercut  
- Mach Punch  
- Hidden Power [Ghost / Flying] / Rock Slide 
- Earthquake / Rock Slide / Bulk Up / Toxic
All-out Attacker (Pidgeot) @ Choice Band / Silk Scarf  
Ability: Keen Eye  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly / Adamant Nature  
- Double-Edge  
- Hidden Power [Flying] / Aerial Ace  
- Quick Attack  
- Return / Hidden Power [Ground] / Toxic / Facade
Choice Band (Aggron) @ Choice Band  
Ability: Sturdy  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant / Jolly Nature  
- Rock Slide  
- Double-Edge  
- Earthquake  
- Focus Punch / Brick Break / Hidden Power [Flying]

Thunder Wave (Aggron) @ Leftovers  
Ability: Sturdy  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant / Jolly Nature  
- Rock Slide  
- Thunder Wave  
- Earthquake / Focus Punch 
- Substitute / Double-Edge

Swords Dance (Kabutops) @ Leftovers / Lum Berry / Salac Berry  
Ability: Swift Swim  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly / Adamant Nature  
- Swords Dance  
- Rock Slide  
- Hidden Power [Ground / Flying]  
- Substitute / Mud Shot / Endure
Choice Band (Kabutops) @ Choice Band  
Ability: Swift Swim   
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly / Adamant Nature  
- Rock Slide  
- Hidden Power [Ground / Flying]  
- Double-Edge / Mud Shot 
- Rapid Spin / Knock Off / Giga Drain / Hyper Beam

Bulky Rapid Spin (Kabutops) @ Leftovers  
Ability: Battle Armor  
EVs: 252 HP / 240 Def / 16 Spe  
Impish Nature  
- Rock Slide / Hidden Power [Rock]  
- Seismic Toss
- Toxic  
- Rapid Spin

Support (Clefable) (F) @ Leftovers  
Ability: Cute Charm  
EVs: 252 HP / 200 Def / 56 SpD  
Bold / Impish / Relaxed Nature  
- Seismic Toss / Return 
- Soft-Boiled  
- Thunder Wave / Toxic
- Encore / Wish / Hidden Power [Grass] / Fire Blast / Counter
(SpDef spread also viable if you need Politoed / Mantine insurance)

Choice Band (Azumarill) @ Choice Band  
Ability: Huge Power  
EVs: 172 HP / 252 Atk / 84 Spe  
Adamant Nature  
- Double-Edge  
- Brick Break  
- Hidden Power [Ghost / Flying]  
- Return / Focus Punch / Body Slam / Iron Tail

Bulky Utility (Azumarill) @ Leftovers  
Ability: Huge Power  
EVs: 176 HP / 192 Atk / 80 Def / 60 SpD  
Careful Nature  
- Return  
- Focus Punch / Brick Break  
- Hidden Power [Ghost] / Protect  
- Refresh / Toxic / Encore

SubPunch (Azumarill) @ Leftovers  
Ability: Huge Power  
EVs: 252 HP / 156 Atk / 100 Spe  
Jolly Nature  
- Return  
- Focus Punch  
- Substitute  
- Toxic / Hidden Power [Ghost] / Encore

Substitute (Whiscash) @ Leftovers  
Ability: Oblivious  
EVs: 172 HP / 160 Atk / 176 Spe  
Naughty / Adamant Nature  
- Earthquake  
- Substitute  
- Ice Beam / Rock Slide 
- Toxic / Rock Slide

Defensive (Whiscash) @ Leftovers  
Ability: Oblivious  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
- Earthquake  
- Ice Beam / Hidden Power [Rock] 
- Toxic / Rest 
- Protect / Sleep Talk

Physical Wallbreaker (Stantler) @ Silk Scarf / Choice Band / Leftovers / Salac Berry  
Ability: Intimidate  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly / Adamant Nature  
- Double-Edge / Return 
- Earthquake  
- Shadow Ball  
- Thunder Wave / Substitute / Return / Endure
All-out Attacker (Primeape) @ Choice Band / Lum Berry
Ability: Vital Spirit  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Cross Chop  
- Hidden Power [Ghost / Flying]
- Rock Slide
- Earthquake / Toxic 
Bulk Up (Primeape) @ Lum Berry / Leftovers / Salac Berry 
Ability: Vital Spirit  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Bulk Up  
- Cross Chop  
- Hidden Power [Ghost / Flying] / Rock Slide 
- Earthquake / Rock Slide / Substitute
(Reversal is possible but inconsistent)
Offensive Spikes (Cacturne) @ Salac Berry  
Ability: Sand Veil  
EVs: 252 HP / 4 SpD / 252 Spe  
Timid Nature  
- Spikes  
- Endure  
- Destiny Bond  
- Hidden Power [Dark / Grass]

Bulky Spikes (Cacturne) @ Leftovers / Lum Berry  
Ability: Sand Veil  
EVs: 252 HP / 80 Def / 176 Spe  
Bold Nature  
- Spikes  
- Giga Drain  
- Hidden Power [Dark / Fire]  
- Counter / Encore / Leech Seed / Toxic
Special Attacker (Metang) @ Leftovers  
Ability: Clear Body  
EVs: 252 HP / 32 Def / 216 SpA / 8 SpD  
Quiet / Modest Nature  
- Psychic
- Pursuit
- Thunder Punch / Toxic
- Explosion / Earthquake / Protect 

Choice Band (Golbat) @ Choice Band  
Ability: Inner Focus  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Sludge Bomb  
- Aerial Ace  
- Hidden Power [Ground]  
- Quick Attack / Giga Drain

Rain Dance (Mantine) @ Lum Berry / Mystic Water  
Ability: Swift Swim  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest / Timid Nature    
- Rain Dance  
- Hydro Pump / Surf  
- Ice Beam  
- Hidden Power [Electric]
Defensive (Mantine) @ Leftovers  
Ability: Water Absorb  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
- Surf  
- Toxic
- Rest / Protect  
- Haze / Sleep Talk / Hidden Power [Psychic]

Special Wallbreaker (Pikachu) @ Light Ball  
Ability: Static  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid / Modest Nature    
- Volt Tackle  
- Hidden Power [Ice / Grass]  
- Substitute
- Toxic / Thunder Wave / Encore

Defensive Spikes (Roselia) @ Leftovers  
Ability: Natural Cure  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature
- Spikes  
- Giga Drain  
- Stun Spore / Aromatherapy / Hidden Power [Fire]  
- Synthesis

Sunny Day (Shiftry) @ Lum Berry / Miracle Seed / Leftovers  
Ability: Chlorophyll  
EVs: 248 SpA / 32 SpD / 228 Spe  
Mild / Modest Nature  
- Sunny Day  
- Solar Beam  
- Hidden Power [Fire / Ground / Rock] 
- Explosion / Extrasensory
Swords Dance (Shiftry) @ Lum Berry / Silk Scarf  
Ability: Chlorophyll  
EVs: 252 Atk / 32 SpD / 224 Spe  
Adamant / Jolly Nature  
- Swords Dance  
- Brick Break  
- Shadow Ball  
- Double-Edge / Explosion / Hidden Power [Flying]
Offensive (Camerupt) @ Leftovers / Choice Band  
Ability: Magma Armor  
EVs: 232 HP / 192 Atk / 84 Spe  
Adamant / Brave Nature  
- Earthquake  
- Fire Blast / Overheat  
- Rock Slide
- Substitute / Explosion  
Physically Defensive (Camerupt) @ Leftovers  
Ability: Magma Armor  
EVs: 252 HP / 252 Def / 4 SpA  
Relaxed Nature  
- Earthquake  
- Fire Blast / Flamethrower 
- Toxic / Rest
- Protect / Sleep Talk

Offensive Utility (Mr. Mime) @ Lum Berry  
Ability: Soundproof  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Psychic  
- Thunderbolt  
- Fire Punch / Taunt 
- Thunder Wave / Encore / Toxic

Calm Mind (Mr. Mime) @ Lum Berry / Leftovers / Salac Berry  
Ability: Soundproof  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature
- Calm Mind
- Psychic  
- Thunderbolt / Fire Punch / Ice Punch   
- Fire Punch / Substitute / Encore
(Bulkier EV spreads are another option)
Support (Chimecho) @ Leftovers  
Ability: Levitate  
EVs: 252 HP / 188 Def / 20 SpD / 48 Spe  
Bold Nature    
- Psychic  
- Heal Bell  
- Calm Mind / Toxic / Reflect
- Hidden Power [Fire / Ice] / Icy Wind 

Bulky Wisp (Haunter) @ Leftovers / Lum Berry  
Ability: Levitate  
EVs: 252 HP / 32 Def / 224 Spe  
Timid Nature
- Thunderbolt
- Psychic / Hidden Power [Fire]    
- Will-O-Wisp  
- Taunt
Pinch Berry (Haunter) @ Salac Berry / Petaya Berry  
Ability: Levitate  
EVs: 4 HP / 252 SpA / 252 Spe  
Hasty / Timid Nature  
- Thunderbolt  
- Psychic  
- Explosion / Destiny Bond / Hidden Power [Fire]  
- Endure / Substitute
Tank (Swalot) @ Leftovers  
Ability: Sticky Hold  
EVs: 232 HP / 140 Atk / 136 SpD  
Careful / Sassy Nature  
- Sludge Bomb  
- Hidden Power [Ground / Grass]
- Shadow Ball / Giga Drain 
- Counter / Explosion

Spikes (Pineco) @ Leftovers  
Ability: Sturdy  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
- Spikes  
- Rapid Spin  
- Explosion / Earthquake  
- Toxic / Earthquake

Dragon Dance (Pupitar) @ Leftovers / Liechi Berry  
Ability: Shed Skin  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Earthquake  
- Rock Slide  
- Hidden Power [Bug] / Protect / Substitute
Wall (Sableye) @ Leftovers  
Ability: Keen Eye  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Seismic Toss  
- Toxic
- Knock Off  
- Recover

Physical Wall (Relicanth) @ Leftovers  
Ability: Swift Swim  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Hidden Power [Rock]  
- Earthquake  
- Toxic / Rest 
- Protect / Sleep Talk

Special Wallbreaker (Magmar) @ Petaya Berry / Charcoal 
Ability: Flame Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Fire Blast  
- Thunder Punch 
- Hidden Power [Water / Grass]  
- Substitute / Toxic
Swords Dance (Sneasel) @ Lum Berry  
Ability: Inner Focus  
EVs: 68 HP / 252 Atk / 188 Spe  
Jolly Nature  
- Swords Dance  
- Return / Double-Edge  
- Brick Break  
- Shadow Ball

Choice Band (Persian) @ Choice Band  
Ability: Limber  
EVs: 68 HP / 252 Atk / 188 Spe  
Jolly Nature  
- Double-Edge  
- Hidden Power [Ground]  
- Shadow Ball  
- Return / Hyper Beam

Lead (Exploud) @ Leftovers  
Ability: Soundproof  
EVs: 28 HP / 204 Atk / 92 Def / 172 SpD / 12 Spe  
Brave / Adamant Nature  
- Double-Edge  
- Fire Blast / Earthquake  
- Counter  
- Protect / Shadow Ball / Hidden Power [Grass] / Toxic

Lead (Octillery) @ Leftovers  
Ability: Suction Cups  
EVs: 244 HP / 12 Def / 252 SpA  
Modest Nature  
- Surf  
- Fire Blast  
- Hidden Power [Electric]  
- Thunder Wave

Rain Dance (Huntail) @ Lum Berry  
Ability: Swift Swim    
EVs: 4 HP / 252 SpA / 252 Spe  
Modest / Timid Nature  
- Rain Dance  
- Hydro Pump / Surf 
- Ice Beam  
- Hidden Power [Electric]

Choice Band (Sharpedo) @ Choice Band  
Ability: Rough Skin  
EVs: 252 Atk / 4 SpA / 252 Spe  
Hasty Nature  
- Earthquake  
- Hidden Power [Flying]  
- Crunch  
- Hyper Beam / Double-Edge

Lead (Ninetales) @ Lum Berry
Ability: Flash Fire  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature
- Fire Blast   
- Hidden Power [Water / Grass / Electric]  
- Will-O-Wisp  
- Grudge

Tank (Torkoal) @ Leftovers  
Ability: White Smoke  
EVs: 252 HP / 32 Def / 148 SpA / 76 SpD  
Relaxed Nature  
- Flamethrower / Fire Blast  
- Explosion  
- Toxic  
- Hidden Power [Grass] / Rock Slide

SEA's right, it does something (Arbok) @ Leftovers  
Ability: Intimidate  
EVs: 32 HP / 252 Atk / 224 Spe  
Adamant / Jolly Nature  
- Sludge Bomb  
- Earthquake
- Rock Slide  
- Glare / Giga Drain / Refresh

Not Useless (Mightyena) @ Leftovers  
Ability: Intimidate  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature
- Crunch  
- Heal Bell  
- Toxic  
- Roar