Z-Chomp

Garchomp @ Firium Z
Ability: Rough Skin
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Swords Dance
- Dragon Claw
- Earthquake
- Fire Fang

Scizor-Mega @ Scizorite
Ability: Light Metal
EVs: 248 HP / 100 Atk / 144 SpD / 16 Spe
Adamant Nature
- Bug Bite
- Bullet Punch
- U-turn
- Roost

Tapu Fini @ Leftovers
Ability: Misty Surge
EVs: 248 HP / 192 Def / 16 SpD / 52 Spe
Calm Nature
- Taunt
- Nature's Madness
- Moonblast
- Defog

Raikou @ Choice Specs
Ability: Pressure
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Thunderbolt
- Hidden Power [Ice]
- Extrasensory

Marowak-Alola @ Thick Club
Ability: Rock Head
EVs: 248 HP / 16 Atk / 240 Def / 4 Spe
Adamant Nature
- Stealth Rock
- Will-O-Wisp
- Shadow Bone
- Flare Blitz

Greninja-Ash @ Choice Specs
Ability: Battle Bond
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Water Shuriken
- Dark Pulse
- Hydro Pump
- U-turn