Mix And Mega Regirock

Volcarona @ Charizardite Y
Ability: Flame Body
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Solar Beam
- Quiver Dance
- Fire Blast
- Hidden Power [Ice]

Decidueye @ Venusaurite
Ability: Overgrow
EVs: 248 HP / 8 Atk / 252 SpD
Careful Nature
- Spirit Shackle
- Roost
- U-turn
- Defog

Regirock @ Tyranitarite
Ability: Sturdy
EVs: 248 HP / 252 Def
Impish Nature
- Rest
- Sleep Talk
- Stone Edge
- Drain Punch

Landorus-Therian @ Mewtwonite X
Ability: Intimidate
EVs: 252 Atk / 252 Spe
Jolly Nature
- Earthquake
- Superpower
- Knock Off
- U-turn

Tapu Lele @ Alakazite
Ability: Psychic Surge
EVs: 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Psychic
- Hidden Power [Fire]
- Moonblast
- Focus Blast

Lapras @ Pidgeotite
Ability: Water Absorb
EVs: 248 HP / 252 SpA / 8 Spe
Modest Nature
IVs: 0 Atk
- Thunder
- Sing
- Blizzard
- Hydro Pump