Mega Latias Balance/Bulky Offense

Hippowdon @ Leftovers
Ability: Sand Stream
EVs: 252 HP / 144 Def / 112 SpD
Impish Nature
- Earthquake
- Stealth Rock
- Slack Off
- Stone Edge

Excadrill @ Life Orb
Ability: Sand Rush
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Earthquake
- Iron Head
- Rock Slide
- Rapid Spin

Keldeo @ Choice Specs
Ability: Justified
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Scald
- Secret Sword
- Hydro Pump
- Icy Wind

Ferrothorn @ Chople Berry
Ability: Iron Barbs
EVs: 252 HP / 88 Def / 168 SpD
Relaxed Nature
- Spikes
- Leech Seed
- Gyro Ball
- Power Whip

Tornadus-Therian @ Assault Vest
Ability: Regenerator
EVs: 96 HP / 160 SpA / 252 Spe
Hasty Nature
- Hurricane
- Heat Wave
- U-turn
- Knock Off

Latias @ Latiasite
Ability: Levitate
EVs: 252 HP / 4 SpD / 252 Spe
Timid Nature
- Thunderbolt
- Stored Power
- Roost
- Calm Mind