some fun :]

Cresselia @ Rocky Helmet
Ability: Levitate
Shiny: Yes
EVs: 252 HP / 252 Def
Bold Nature
IVs: 0 Atk
- Thunder Wave
- Toxic
- Ice Beam
- Moonlight

Metagross-Mega @ Metagrossite
Ability: Clear Body
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Meteor Mash
- Bullet Punch
- Ice Punch
- Thunder Punch

Gliscor @ Toxic Orb
Ability: Poison Heal
EVs: 252 HP / 184 Def / 72 Spe
Impish Nature
- Stealth Rock
- Knock Off
- Earthquake
- Protect

Volcarona @ Psychium Z
Ability: Flame Body
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Giga Drain
- Fiery Dance
- Quiver Dance
- Psychic

Tapu Fini @ Leftovers
Ability: Misty Surge
EVs: 252 HP / 252 SpD
Modest Nature
IVs: 0 Atk
- Scald
- Nature's Madness
- Taunt
- Defog

Greninja-Ash @ Choice Specs
Ability: Battle Bond
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Water Shuriken
- Hydro Pump
- Ice Beam
- Dark Pulse