VinCune Balance - the best

Heatran @ Leftovers
Ability: Flash Fire
EVs: 248 HP / 128 SpA / 128 SpD / 4 Spe
Calm Nature
IVs: 0 Atk
- Magma Storm
- Earth Power
- Substitute
- Taunt

Suicune @ Leftovers
Ability: Pressure
EVs: 252 HP / 40 SpD / 216 Spe
Timid Nature
IVs: 0 Atk
- Scald
- Substitute
- Calm Mind
- Protect

Landorus-Therian @ Rockium Z
Ability: Intimidate
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Stone Edge
- Swords Dance
- Stealth Rock

Pinsir-Mega @ Pinsirite
Ability: Aerilate
Happiness: 0
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Frustration
- Earthquake
- Quick Attack
- Swords Dance

Toxapex @ Leftovers
Ability: Regenerator
EVs: 248 HP / 252 SpD / 8 Spe
Calm Nature
IVs: 0 Atk
- Scald
- Toxic Spikes
- Recover
- Haze

Mew @ Leftovers
Ability: Synchronize
EVs: 252 HP / 252 SpD / 4 Spe
Calm Nature
IVs: 0 Atk
- Soft-Boiled
- Will-O-Wisp
- Ice Beam
- Defog