Psychic terrain

Smeargle @ Focus Sash
Ability: Own Tempo
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Nuzzle
- Rapid Spin
- Sticky Web
- Glare

Tapu Lele @ Terrain Extender
Ability: Psychic Surge
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Taunt
- Psychic
- Moonblast
- Nature's Madness

Deoxys-Attack @ Focus Sash
Ability: Pressure
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Nasty Plot
- Dark Pulse
- Ice Beam
- Psychic

Aerodactyl-Mega @ Aerodactylite
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Stealth Rock
- Taunt
- Wing Attack
- Rock Tomb

Arceus-Ghost @ Ghostium Z
Ability: Multitype
EVs: 56 HP / 252 Atk / 4 SpD / 196 Spe
Jolly Nature
- Substitute
- Swords Dance
- Shadow Force
- Brick Break

Xerneas @ Power Herb
Ability: Fairy Aura
EVs: 140 HP / 44 Def / 200 SpA / 40 SpD / 84 Spe
Modest Nature
IVs: 0 Atk
- Geomancy
- Hidden Power [Fire]
- Moonblast
- Thunder