Cinderace @ Muscle Band
Ability: Blaze
EVs: 252 Atk/ 252 Spe/ 4 HP
Adamant Nature (+Atk -SpA)
-Pyro Ball
-High Jump Kick
-Iron Head
-U-Turn
Pyro Ball is obviously there due to being strong and reliable STAB, High Jump Kick for strong coverage and counters rock types, Iron Head for Countering against rock types that have another type that makes it not weak to fighting, U-Turn for escaping and getting in a sneaky switch to a pokemon that will be the best counter for the opposing pokemon.
Kommo-o @ Salac Berry
Ability: Bulletproof
Jolly Nature (+Spe -SpA)
EVs: 252 Atk/ 252 Spe/ 4 HP
-Substitute
-Belly Drum
-Drain Punch
-Iron Head
My strategy is to make Kommo-o substitute first, dragging it to 75% health, then use belly drum to max his attack as the substitute tanks the hit and bring Kommo-o to max attack but only at 25% health left, this is where the Salac Berry comes in, raising its speed and that will get its speed to over 400 making it outspeed almost everything, with only little health left, Kommo-o can OHKO almost everything in its path with Drain Punch plus healing alot, I decided to give it iron head for its other move instead for STAB dragon claw, because otherwise, Kommo-o will really struggle dealing with fairy types.
Klefki @ Light Clay
Ability: Prankster
Bold Nature (+Def -Atk)
EVs: 252 Def/ 252 HP/ 4 SpD
-Light Screen
-Reflect
-Toxic
-Thunder Wave
Klefki would be a great support for the team, with the light clay, reflect and light screen will last for 8 turns, Toxic will be for fun trolling to poison and when it battles a poison type, Klefki will use thunder wave instead, as soon as those barries get in place, I will switch with the next pokemon that can sweep like Kommo-o that i mention earlier.
Zacian @ Rusted Sword
Ability: Intrepid Sword
Jolly Nature (+Spe -SpA)
EVs: 252 Atk/ 252 Spe/ 4 HP
-Behemoth Blade
-Play Rough
-Close Combat/ Sacred Sword
-Swords Dance
What can I say, Zacian is a huge beast that hits like a truck, behemoth blade and play rough are for strong stab, swords dance for fun setting up, close combat for strong coverage, if you're not a fan of defence and special defence drops then use sacred sword instead, it is still a decently powered fighting type move that ignores stat changes which could be good in certain situations.
Gyarados @ Leftovers
Ability: Intimidate
Jolly Nature (+Spe -SpA)
EVs: 252 Atk/ 252 Spe/ 4 HP
-Dragon Dance
-Waterfall
-Ice Fang/Crunch
-Earthquake
Waterfall is obvious, Dragon Dance is an excellent boosting move for fun sweeping, Ice Fang for decent coverage (It's an ice type move so it's super effective to quite a decent chunk of types) or go for crunch instead since it's stronger than ice fang, and finally earthquake, a really strong move and is the perfect counter against the 2 types strong to Gyarados.
Gallade @ Leftovers
Ability: Steadfast
Jolly Nature (+Spe -Atk)
EVs: 252 Atk/ 252 Spe/ 4 HP
-Psycho Cut
-Drain Punch
-Shadow Claw
-Swords Dance
Psycho Cut is a must since its the best physical psychic type move Gallade knows, Shadow Claw to counter Ghost types, and it gets the sweep plus healing technique like Kommo-o does, deal alot of damage and heal almost completely to full.