Mega Heracross Offense

Metagross @ Assault Vest
Ability: Clear Body
EVs: 252 HP / 160 Atk / 96 SpD
Adamant Nature
- Pursuit
- Meteor Mash
- Bullet Punch
- Earthquake

Heracross @ Heracronite
Ability: Moxie
EVs: 240 HP / 136 Atk / 132 Spe
Adamant Nature
- Close Combat
- Pin Missile
- Rock Blast
- Substitute

Landorus-Therian @ Rocky Helmet
Ability: Intimidate
EVs: 248 HP / 244 Def / 8 SpD / 8 Spe
Impish Nature
- Earthquake
- Stealth Rock
- U-turn
- Stone Edge

Latios @ Life Orb
Ability: Levitate
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Draco Meteor
- Psyshock
- Roost
- Defog

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

Thundurus @ Life Orb
Ability: Prankster
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Thunder Wave
- Thunderbolt
- Hidden Power Ice
- Grass Knot