mdiancie + specs hydra bulky offense

Diancie-Mega @ Diancite
Ability: Magic Bounce
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Moonblast
- Diamond Storm
- Hidden Power [Fire]
- Protect

Hydreigon @ Choice Specs
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Draco Meteor
- Dark Pulse
- Flash Cannon
- Flamethrower

Slowbro @ Rocky Helmet
Ability: Regenerator
EVs: 252 HP / 252 Def / 4 Spe
Bold Nature
IVs: 0 Atk
- Scald
- Psyshock
- Slack Off
- Calm Mind

Heatran @ Leftovers
Ability: Flash Fire
EVs: 252 HP / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Stealth Rock
- Taunt
- Toxic
- Lava Plume

Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 252 HP / 88 Def / 168 SpD
Relaxed Nature
IVs: 0 Spe
- Spikes
- Leech Seed
- Power Whip
- Gyro Ball

Landorus-Therian @ Choice Scarf
Ability: Intimidate
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Stone Edge
- U-turn
- Knock Off