Mega alt VGC

Altaria @ Altarianite
Ability: Cloud Nine
Level: 50
EVs: 196 HP / 252 SpA / 60 Spe
Modest Nature
- Hyper Voice
- Fire Blast
- Earthquake
- Tailwind

Landorus-Therian @ Choice Scarf
Ability: Intimidate
Level: 50
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Earthquake
- Rock Slide
- Knock Off
- U-turn

Amoonguss @ Rocky Helmet
Ability: Regenerator
Level: 50
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
IVs: 0 Atk
- Sludge Bomb
- Giga Drain
- Rage Powder
- Spore

Suicune @ Sitrus Berry
Ability: Pressure
Level: 50
EVs: 252 HP / 156 Def / 76 SpA / 4 SpD / 20 Spe
Bold Nature
IVs: 0 Atk
- Scald
- Ice Beam
- Protect
- Tailwind

Heatran @ Leftovers
Ability: Flash Fire
Level: 50
EVs: 180 HP / 244 SpA / 84 Spe
Modest Nature
- Earth Power
- Heat Wave
- Flash Cannon
- Protect

Hydreigon @ Life Orb
Ability: Levitate
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
- Earth Power
- Fire Blast
- Draco Meteor
- Protect

I am still unsure if i run flash cannon heatran or Substitude but i kinda want it to deal with fairy's sutch as M-gard mutch better.