Mega Heracross+Porygon-Z

Heracross-Mega @ Heracronite
Ability: Skill Link
EVs: 252 Atk / 216 Spe
Adamant Nature
- Close Combat
- Swords Dance
- Rock Blast
- Earthquake

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

Tapu Fini @ Leftovers
Ability: Misty Surge
EVs: 248 HP / 192 Def / 16 SpD / 52 Spe
Calm Nature
- Taunt
- Nature's Madness
- Moonblast
- Defog

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

Serperior @ Leftovers
Ability: Contrary
EVs: 56 HP / 200 SpA / 252 Spe
Timid Nature
- Substitute
- Leech Seed
- Leaf Storm
- Hidden Power [Fire]

Porygon-Z @ Normalium Z
Ability: Adaptability
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Shadow Ball
- Discharge
- Recover
- Conversion