A Balanced Team

Dragonite (M) @ Leftovers
Trait: Multiscale
EVs: 252 HP / 12 Atk / 72 SDef / 172 Spd
Jolly Nature (+Spd, -SAtk)
- Dragon Dance
- Dragon Claw
- Substitute
- Roost

Jellicent (M) @ Leftovers
Trait: Water Absorb
EVs: 248 HP / 200 Def / 60 SDef
Bold Nature (+Def, -Atk)
- Shadow Ball
- Will-O-Wisp
- Scald
- Recover

Forretress (M) @ Leftovers
Trait: Sturdy
EVs: 252 HP / 216 Def / 40 SDef
Relaxed Nature (+Def, -Spd)
- Toxic Spikes
- Rapid Spin
- Gyro Ball
- Volt Switch

Heatran (M) @ Leftovers
Trait: Flash Fire
EVs: 252 HP / 4 Def / 252 SDef
Calm Nature (+SDef, -Atk)
- Lava Plume
- Roar
- Stealth Rock
- Protect

Virizion @ Leftovers
Trait: Justified
EVs: 252 Atk / 4 Def / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Swords Dance
- Close Combat
- Leaf Blade
- Stone Edge

Mew @ Leftovers
Trait: Synchronize
EVs: 4 Def / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Nasty Plot
- Psychic
- Aura Sphere
- Flamethrower