Koko dead, Lucha useless, or nah

Hawlucha @ Psychic Seed
Ability: Unburden
EVs: 248 HP / 252 Atk / 8 SpD
Adamant Nature
- Drain Punch
- Acrobatics
- Bulk Up
- Substitute

Tapu Koko @ Choice Scarf
Ability: Electric Surge
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Wild Charge
- Brave Bird
- U-turn
- Dazzling Gleam

Tangrowth @ Assault Vest
Ability: Regenerator
EVs: 252 HP / 4 Def / 252 SpD
Sassy Nature
- Giga Drain
- Earthquake
- Sludge Bomb
- Knock Off

Scizor-Mega @ Scizorite
Ability: Technician
EVs: 252 HP / 4 Atk / 24 Def / 228 SpD
Careful Nature
- Bullet Punch
- U-turn
- Defog
- Roost

Mew @ Mewnium Z
Ability: Synchronize
EVs: 252 HP / 252 SpA / 4 Spe
Modest Nature
IVs: 0 Atk
- Psychic
- Earth Power
- Volt Switch
- Soft-Boiled

Heatran @ Shed Shell
Ability: Flash Fire
EVs: 248 HP / 4 Def / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Lava Plume
- Flash Cannon
- Earth Power
- Stealth Rock