hi, i'm overview (Swampert-Mega) @ Swampertite    

Calm Mind 3 Attacks (Magearna) @ Aguav Berry / Leftovers  
Ability: Soul-Heart  
EVs: 248 HP / 72 Def / 136 SpA / 8 SpD / 44 Spe  
Modest Nature  
IVs: 0 Atk  
- Fleur Cannon  
- Focus Blast  
- Thunderbolt  
- Calm Mind

Calm Mind + Pain Split (Magearna) @ Fairium Z / Leftovers  
Ability: Soul-Heart  
EVs: 248 HP / 28 Def / 180 SpA / 8 SpD / 44 Spe  
Modest Nature  
IVs: 0 Atk  
- Calm Mind  
- Pain Split  
- Fleur Cannon  
- Thunderbolt

Dragon Dance [full] (Charizard-Mega-X) @ Charizardite X  
Ability: Tough Claws  
EVs: 252 Atk / 4 SpD / 252 Spe  
- Dragon Dance
- Flare Blitz
- Earthquake
- Dragon Claw / Roost 

Pursuit [full] (Tyranitar-Mega) @ Tyranitarite  
Ability: Sand Stream  
EVs: 128 HP / 252 Atk / 128 Spe  
Adamant Nature  
- Stealth Rock / Crunch / Ice Punch  
- Stone Edge  
- Pursuit  
- Fire Punch / Crunch / Ice Punch

Dragon Dance (Tyranitar-Mega) @ Tyranitarite  
Ability: Sand Stream  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Stone Edge  
- Fire Punch  
- Ice Punch

Substitute [full] (Serperior) @ Leftovers  
Ability: Contrary  
Hidden Power: Fire 
EVs: 56 HP / 200 SpA / 252 Spe  
Timid Nature
IVs: 0 Atk  
- Leaf Storm  
- Hidden Power [Fire] / Glare
- Substitute  
- Leech Seed / Glare

Choice Scarf (Serperior) @ Choice Scarf  
Ability: Contrary  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Leaf Storm  
- Glare  
- Defog  
- Knock Off  
 

Offensive [full] (Volcarona) @ Buginium Z / Aguav Berry / Leftovers / Psychium Z  
Ability: Flame Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Quiver Dance  
- Flamethrower / Fire Blast  
- Bug Buzz / Giga Drain  
- Hidden Power [Ground] / Psychic

Bulky (Volcarona) @ Leftovers  
Ability: Flame Body  
EVs: 252 HP / 192 Def / 64 Spe  
Bold Nature  
IVs: 0 Atk  
- Flamethrower  
- Bug Buzz  
- Quiver Dance  
- Roost

Offensive (full) (Diancie-Mega) @ Diancite  
Ability: Magic Bounce  
EVs: 4 Atk / 252 SpA / 252 Spe  
Hasty Nature  
IVs: 0 Atk
- Stealth Rock / Protect  
- Moonblast  
- Diamond Storm  
- Earth Power / Hidden Power [Ice] / Hidden Power [Fire]

Greninja @ Choice Scarf  
Ability: Protean  
EVs: 176 Atk / 80 SpA / 252 Spe  
Hasty Nature  
- Rock Slide  
- U-turn  
- Ice Beam  
- Gunk Shot / Spikes