Trick Room UU

Cofagrigus (M) @ Chesto Berry
Trait: Mummy
EVs: 252 HP / 252 Def / 4 Spd
Bold Nature (+Def, -Atk)
- Rest
- Shadow Ball
- Calm Mind
- Trick Room

Slaking (F) @ Leftovers
Trait: Truant
EVs: 4 HP / 252 Atk / 252 Def
Adamant Nature (+Atk, -SAtk)
- Facade
- Pursuit
- Earthquake
- Slack Off

Gallade (M) @ Leftovers
Trait: Steadfast
EVs: 240 HP / 40 Atk / 216 SDef / 12 Spd
Careful Nature (+SDef, -SAtk)
- Bulk Up
- Drain Punch
- Ice Punch
- Shadow Sneak

Regigigas @ Leftovers
Trait: Slow Start
EVs: 48 HP / 252 Atk / 210 Spd
Adamant Nature (+Atk, -SAtk)
- Confuse Ray
- Thunder Wave
- Frustration
- Earthquake

Cresselia (F) @ Leftovers
Trait: Levitate
EVs: 252 HP / 4 Def / 252 SDef
Calm Nature (+SDef, -Atk)
- Trick Room
- Toxic
- Moonlight
- Psychic

Ferroseed (F) @ Eviolite
Trait: Iron Barbs
EVs: 4 HP / 252 Def / 252 SDef
Calm Nature (+SDef, -Atk)
- Leech Seed
- Protect
- Spikes
- Gyro Ball