Mega mence stall

Chesnaught @ Leftovers
Ability: Bulletproof
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Synthesis
- Super Fang
- Drain Punch
- Spikes

Quagsire @ Leftovers
Ability: Unaware
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
IVs: 0 Atk
- Scald
- Recover
- Haze
- Toxic

Salamence-Mega @ Salamencite
Ability: Aerilate
Happiness: 0
EVs: 248 HP / 96 Def / 164 SpD
Adamant Nature
- Dragon Tail
- Roost
- Dragon Dance
- Frustration

Tentacruel @ Black Sludge
Ability: Liquid Ooze
EVs: 252 HP / 252 SpD / 4 Spe
Calm Nature
IVs: 0 Atk
- Rapid Spin
- Scald
- Acid Spray
- Sludge Bomb

Chansey (F) @ Eviolite
Ability: Natural Cure
EVs: 252 Def / 252 SpD
Bold Nature
IVs: 0 Atk
- Wish
- Soft-Boiled
- Seismic Toss
- Heal Bell

Skarmory @ Shed Shell
Ability: Sturdy
EVs: 252 HP / 232 Def / 24 Spe
Impish Nature
- Brave Bird
- Whirlwind
- Stealth Rock
- Roost