M-Cham + Gren scarf+ Koko-Z

Tapu Koko @ Electrium Z
Ability: Electric Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Thunderbolt
- Roost
- Hidden Power [Ice]

Greninja @ Choice Scarf
Ability: Protean
EVs: 176 Atk / 80 SpA / 252 Spe
Hasty Nature
- Ice Beam
- U-turn
- Rock Slide
- Gunk Shot

Tangrowth @ Assault Vest
Ability: Regenerator
EVs: 252 HP / 28 Def / 228 SpD
Sassy Nature
- Earthquake
- Knock Off
- Giga Drain
- Hidden Power [Fire]

Mew @ Leftovers
Ability: Synchronize
EVs: 240 HP / 156 Def / 112 Spe
Timid Nature
IVs: 0 Atk
- Defog
- Ice Beam
- Soft-Boiled
- Will-O-Wisp

Gliscor @ Toxic Orb
Ability: Poison Heal
EVs: 244 HP / 44 Def / 108 SpD / 112 Spe
Jolly Nature
- Stealth Rock
- Earthquake
- U-turn
- Roost

Medicham-Mega @ Medichamite
Ability: Pure Power
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Fake Out
- High Jump Kick
- Zen Headbutt
- Bullet Punch