OU Psy Terrain

Tapu Lele @ Terrain Extender
Ability: Psychic Surge
EVs: 248 HP / 8 Def / 252 SpA
Modest Nature
IVs: 0 Atk
- Psyshock
- Moonblast
- Hidden Power [Fire]
- Taunt

Mew @ Mewnium Z
Ability: Synchronize
EVs: 252 HP / 4 Def / 248 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Psychic
- Earth Power
- Roost
- Defog

Greninja @ Choice Scarf
Ability: Protean
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
- Extrasensory
- Hydro Pump
- Gunk Shot
- Ice Beam

Hawlucha @ Psychic Seed
Ability: Unburden
EVs: 248 HP / 216 Atk / 44 Spe
Adamant Nature
- Drain Punch
- Acrobatics
- Bulk Up
- Swords Dance

Volcarona @ Charti Berry
Ability: Flame Body
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Quiver Dance
- Psychic
- Fiery Dance
- Giga Drain

Tyranitar-Mega @ Tyranitarite
Ability: Sand Stream
EVs: 248 HP / 252 Atk / 8 SpD
Adamant Nature
- Stone Edge
- Pursuit
- Earthquake
- Stealth Rock