Mega Latios Bulky Offense (OU)

Greninja-Ash (M) @ Choice Specs
Ability: Battle Bond
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Hydro Pump
- Dark Pulse
- Water Shuriken
- U-turn

Firefly (Volcarona) (F) @ Firium Z
Ability: Flame Body
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Fire Blast
- Bug Buzz
- Hidden Power [Ground]
- Quiver Dance

Usain Bolt (Zapdos) @ Leftovers
Ability: Pressure
EVs: 248 HP / 240 Def / 20 Spe
Bold Nature
IVs: 0 Atk
- Discharge
- Heat Wave
- Defog
- Roost

Rose (Ferrothorn) (F) @ Leftovers
Ability: Iron Barbs
EVs: 252 HP / 48 Def / 208 SpD
Careful Nature
- Stealth Rock
- Power Whip
- Leech Seed
- Protect

Big Brother (Latios-Mega) (M) @ Latiosite
Ability: Levitate
EVs: 4 Atk / 252 SpA / 252 Spe
Naive Nature
- Draco Meteor
- Psychic
- Earthquake
- Roost

Meta (Landorus-Therian) (M) @ Choice Scarf
Ability: Intimidate
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Earthquake
- Stone Edge
- Hidden Power [Ice]
- U-turn