Semi stall OU

Heatran @ Leftovers
Ability: Flash Fire
EVs: 252 HP / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Stealth Rock
- Taunt
- Lava Plume
- Earth Power

Gastrodon @ Leftovers
Ability: Storm Drain
EVs: 252 HP / 112 Def / 144 SpD
Sassy Nature
- Toxic
- Scald
- Earthquake
- Recover

Clefable @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 212 Def / 40 SpD / 4 Spe
Bold Nature
IVs: 0 Atk
- Calm Mind
- Soft-Boiled
- Thunder Wave
- Moonblast

Garchomp @ Choice Scarf
Ability: Rough Skin
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Fire Blast
- Outrage
- Earthquake
- Dragon Claw

Latias-Mega (F) @ Latiasite
Ability: Levitate
EVs: 252 HP / 4 Def / 252 Spe
Timid Nature
IVs: 0 Atk
- Defog
- Ice Beam
- Thunderbolt
- Recover

Rotom-Wash @ Leftovers
Ability: Levitate
EVs: 252 HP / 212 Def / 44 Spe
Bold Nature
IVs: 0 Atk
- Volt Switch
- Hydro Pump
- Pain Split
- Will-O-Wisp