I'll just do a real quick rate to give you my thoughts on some small changes for the team.
Changes in Bold:
Snorlax @ Figy Berry
Ability: Gluttony
Level: 50
Shiny: Yes
EVs: 140 HP / 140 Atk / 140 Def / 84 SpD
Adamant Nature
- Recycle
- Curse
- Return
- Protect
This one was really good, I like the set, he just needs protect. Rock slide doesn't do a whole lot on a slow Snorlax (outside of TR).
Kommo-o @ Kommonium Z
Ability: Bulletproof
Level: 50
EVs: 76 HP / 4 Atk / 76 Def / 252 SpA / 68 SpD / 28 Spe
Mild Nature
- Clanging Scales
- Flamethrower
- Protect
- Close Combat
This was fine for the most part. Use a more specially based Kommo-O. Also you need to have protect on this guy, as once he gets his boosts up, he is a prime target to get doubled up into.
Arcanine @ Assault Vest
Ability: Intimidate
Level: 50
EVs: 52 HP / 168 Atk / 156 SpD / 132 Spe
Adamant Nature
- Flare Blitz
- Wild Charge
- Extreme Speed
- Close Combat
Having a mixed Arcanine usually isn't optimal, go for a purely special or purely physical unless you are a very sure of a specific niche you want mixed Arcanine to fill (i.e. extreme speed/ snarl/ burn up Arcanine). Close Combat and the Wild Charge were added for coverage. Always use Intimidate, and Assault Vest is a better item than a Charcoal.
Tapu Koko @ Choice Specs
Ability: Electric Surge
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Hidden Power Ice
- Dazzling Gleam
- Volt Switch
- Thunderbolt
A choice band doesn't help your special attacking Koko at all, use Choice Specs to maximize damage. HP Ice is for Landorus and Dragons. Also a Timid nature and 4 EVs in HP would be better for your stats.
Ninetales-Alola @ Focus Sash
Ability: Snow Warning
Level: 50
Shiny: Yes
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Aurora Veil
- Blizzard
- Freeze-Dry
- Protect
This one is perfect, just needs the sash, to give it some longevity.
Charizard Mega-X @ Charizardite X
Ability: Tough Claws
Level: 50
EVs: 4 HP / 4 Atk / 252 Spe
Adamant Nature
- Flare Blitz
- Dragon Claw
- Dragon Dance
- Protect
You needed a Mega on the team, and Charizard X fit the mold. You didn't like Muk, so thats who I took out. He is a really good partner for Ninetales, and allows your team to have some speed control through D-Dance. But if you wanted another Mega in this slot, I think most standard Megas would here.
Thanks! Hoped you like the new team.