Durp

Dusclops (M) @ Leftovers
Trait: Pressure
EVs: 252 HP / 252 Def / 4 SDef
Relaxed Nature (+Def, -Spd)
- Will-O-Wisp
- Rest
- Seismic Toss
- Toxic

Blissey (F) @ Leftovers
Trait: Natural Cure
EVs: 252 HP / 184 Def / 72 SDef
Bold Nature (+Def, -Atk)
- Aromatherapy
- Ice Beam
- Toxic
- Softboiled

Skarmory (M) @ Leftovers
Trait: Keen Eye
EVs: 252 HP / 84 Def / 172 SDef
Careful Nature (+SDef, -SAtk)
- Taunt
- Hidden Power [Flying]
- Rest
- Whirlwind

Cloyster (M) @ Leftovers
Trait: Shell Armor
EVs: 252 HP / 252 Def / 4 Spd
Bold Nature (+Def, -Atk)
- Rapid Spin
- Spikes
- Surf
- Rest

Dugtrio (M) @ Choice Band
Trait: Arena Trap
EVs: 4 HP / 252 Atk / 252 Spd
Adamant Nature (+Atk, -SAtk)
- Earthquake
- Hidden Power [Bug]
- Rock Slide
- Aerial Ace

Celebi @ Leftovers
Trait: Natural Cure
EVs: 252 HP / 128 Def / 128 Spd
Bold Nature (+Def, -Atk)
- Calm Mind
- Giga Drain
- Recover
- Hidden Power [Fire]