Mega Aero / Reuni

Reuniclus @ Psychium Z
Ability: Magic Guard
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
IVs: 0 Atk / 0 Spe
- Calm Mind
- Psyshock
- Signal Beam
- Recover

Aerodactyl-Mega @ Aerodactylite
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Stealth Rock
- Stone Edge
- Fire Fang
- Roost

Tapu Bulu @ Choice Scarf
Ability: Grassy Surge
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Wood Hammer
- Horn Leech
- Stone Edge
- Superpower

Celesteela @ Leftovers
Ability: Beast Boost
EVs: 252 HP / 100 Def / 152 SpD / 4 Spe
Relaxed Nature
- Leech Seed
- Protect
- Heavy Slam
- Flamethrower

Gastrodon @ Leftovers
Ability: Storm Drain
EVs: 252 HP / 4 Def / 252 SpD
Careful Nature
- Scald
- Earthquake
- Recover
- Toxic

Mew @ Leftovers
Ability: Synchronize
EVs: 252 HP / 40 Def / 216 Spe
Bold Nature
IVs: 0 Atk
- Will-O-Wisp
- Roost
- Defog
- Ice Beam