Toxtricity @ Life Orb
Ability: Punk Rock
Shiny: Yes
EVs: 4 Atk / 252 SpA / 252 Spe
Mild Nature
- Shift Gear
- Boomburst
- Overdrive
- Gunk Shot
Toxtricity's role is mainly to counter Fairy types with gunk shot. I gave it Boomburst and Overdrive as those are boosted by its Punck rock ability. I put Life Orb and shift gear on it mainly to boost Gunk Shot's power. Its not very fast but if it does live a hit it does an insane amount of damage. Its meant as a Mixed attacker that covers Fairy types like Clefable and the Tapus, Grass types like rillaboom and tapu bulu, and water types like urushifu and toxipex.
Landorus-Therian @ Life Orb
Ability: Intimidate
Shiny: Yes
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Earthquake
- U-turn
- Stone Edge
- Sludge Wave
Landorus is my counter to ground and electric types. My team is pretty weak to ground and electric types so I can switch into him when there is a ground type or electric type on the field. Earthquake gives him a powerful STAB move, U-turn lets him swutch out if there are ice-types, sludge wave gives him coverage against fairy and grass types, and Stone Edge lets him hit flying and fire types for super effective damage. Landorus is my Physical attacker.
Dragapult @ Choice Specs
Ability: Infiltrator
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Shadow Ball
- Draco Meteor
- U-turn
- Thunderbolt
Dragapult is my Special attacker. he can slightly counter other dragon types, and normal and fighting types. Shadow ball and Draco meteor give hime powerful STAB moves. U-turn give him a way to switch from ice and fairy types. Thunderbolt lets him hit water and flying types. The Choice specs makes him hit like a truck and balances out the special attack drop that draco meteor has. Infiltrator lets him hit through moves like protect and baneful bunker that are usualy run on mons like toxipex.
Blaziken @ Life Orb
Ability: Speed Boost
Shiny: Yes
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Swords Dance
- Flare Blitz
- Close Combat
- Earthquake
Blaziken is my prominent physical attacker. speed boost makes it so after a turn or two he always hits first. earthquake gives him ways to take out his counters if he already has plus speed. Flare Blitz and Close Combat are extremley powerful STAB moves. Swords dance and life orb lets it raise its power to insane levels. It has a lot of counters but there are other mons that cover those weaknesses. Weaknesses like ground and fighting are covered by Landorus, and Fairy is covered by Toxtricty.
Grimmsnarl @ Leftovers
Ability: Prankster
Shiny: Yes
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Foul Play
- Play Rough
- Bulk Up
- Sucker Punch
Grimmsnarl is One of my two bulky mons. His Dark Fairy typing makes him completley wall Dragon and psychic types that otherwise wreck my team. He is meant to survive a hit or two, and hit back with a lot of power. Play rough and foul play give him STAB moves. Sucker punch is incase the opponent is going to outspeed and mone shot me. And if i can get a free bulk up then Grimmsnarl becomes unstoppable as he can one-shot alot of things and take hits very well.
Toxapex (M) @ Leftovers
Ability: Regenerator
Shiny: Yes
EVs: 248 HP / 252 Def / 8 SpD
Bold Nature
IVs: 0 Atk
- Recover
- Baneful Bunker
- Toxic Spikes
- Scald
Toxipex is my main tank. water and poison means it covers means it walls fairy and steel types, and can set up toxic spikes and stall with recover. The idea is to try and poison the opponent with toxic spikes or baneful bunker and then stall with recover. Scald gives it coverage against fire types and regenerator means that if i live an electric attack i can switch out to Landorus and when i come back i will have enough HP to recover.
Ability: Punk Rock
Shiny: Yes
EVs: 4 Atk / 252 SpA / 252 Spe
Mild Nature
- Shift Gear
- Boomburst
- Overdrive
- Gunk Shot
Toxtricity's role is mainly to counter Fairy types with gunk shot. I gave it Boomburst and Overdrive as those are boosted by its Punck rock ability. I put Life Orb and shift gear on it mainly to boost Gunk Shot's power. Its not very fast but if it does live a hit it does an insane amount of damage. Its meant as a Mixed attacker that covers Fairy types like Clefable and the Tapus, Grass types like rillaboom and tapu bulu, and water types like urushifu and toxipex.
Landorus-Therian @ Life Orb
Ability: Intimidate
Shiny: Yes
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Earthquake
- U-turn
- Stone Edge
- Sludge Wave
Landorus is my counter to ground and electric types. My team is pretty weak to ground and electric types so I can switch into him when there is a ground type or electric type on the field. Earthquake gives him a powerful STAB move, U-turn lets him swutch out if there are ice-types, sludge wave gives him coverage against fairy and grass types, and Stone Edge lets him hit flying and fire types for super effective damage. Landorus is my Physical attacker.
Dragapult @ Choice Specs
Ability: Infiltrator
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Shadow Ball
- Draco Meteor
- U-turn
- Thunderbolt
Dragapult is my Special attacker. he can slightly counter other dragon types, and normal and fighting types. Shadow ball and Draco meteor give hime powerful STAB moves. U-turn give him a way to switch from ice and fairy types. Thunderbolt lets him hit water and flying types. The Choice specs makes him hit like a truck and balances out the special attack drop that draco meteor has. Infiltrator lets him hit through moves like protect and baneful bunker that are usualy run on mons like toxipex.
Blaziken @ Life Orb
Ability: Speed Boost
Shiny: Yes
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Swords Dance
- Flare Blitz
- Close Combat
- Earthquake
Blaziken is my prominent physical attacker. speed boost makes it so after a turn or two he always hits first. earthquake gives him ways to take out his counters if he already has plus speed. Flare Blitz and Close Combat are extremley powerful STAB moves. Swords dance and life orb lets it raise its power to insane levels. It has a lot of counters but there are other mons that cover those weaknesses. Weaknesses like ground and fighting are covered by Landorus, and Fairy is covered by Toxtricty.
Grimmsnarl @ Leftovers
Ability: Prankster
Shiny: Yes
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Foul Play
- Play Rough
- Bulk Up
- Sucker Punch
Grimmsnarl is One of my two bulky mons. His Dark Fairy typing makes him completley wall Dragon and psychic types that otherwise wreck my team. He is meant to survive a hit or two, and hit back with a lot of power. Play rough and foul play give him STAB moves. Sucker punch is incase the opponent is going to outspeed and mone shot me. And if i can get a free bulk up then Grimmsnarl becomes unstoppable as he can one-shot alot of things and take hits very well.
Toxapex (M) @ Leftovers
Ability: Regenerator
Shiny: Yes
EVs: 248 HP / 252 Def / 8 SpD
Bold Nature
IVs: 0 Atk
- Recover
- Baneful Bunker
- Toxic Spikes
- Scald
Toxipex is my main tank. water and poison means it covers means it walls fairy and steel types, and can set up toxic spikes and stall with recover. The idea is to try and poison the opponent with toxic spikes or baneful bunker and then stall with recover. Scald gives it coverage against fire types and regenerator means that if i live an electric attack i can switch out to Landorus and when i come back i will have enough HP to recover.
Have a good day 
and Blaziken 
are not common choice in OU but I think they have a pretty ok sweep potential with Screens, so I will try to propose something with these two.
: As I said previously, Toxapex doesn’t fit in this kind of team. Here, we want to have something that will abuse screens from Grimmsnarl (I’ll talk about him later) and thus Bisharp 
which also have Defiant to prevent Defog and some setup option but Bisharp could be more helpful against opposing Dragapult that can ignore your screens thanks to Infiltrator. Here is a pretty standard Bisharp set you can use:
or Regieleki 
is that slot as they both are good screens setter with the former being able to pivot thanks to U-Turn. Keep in my mind, however, that Dragapult may be much more of a threat without Grimmsnarl. Don't hesitate to try different option here to see, you can even try to use Ninetales Alola 
which can setup Aurora Veil.
Choice Specs Dragapult is a threat, but here as you have Screens support from Grimmsnarl, you rather use a setup variant with Dragon Dance and Weakness Policy as it can take almost any hits under Screens. Here is the set I’m thinking of:
/ Slowking 
are common and you want to be able to hit them super effectively.
