Incineroar @Incinium Z
Ability: Blaze
-Darkest Lariat
-Flare Blitz
-Thunder Punch
-Brick Break
After playing through Moon with Poplio, I'm going for something different this time. Incineroar offers the team fantastic power and with stellar base attack, it can break through bulky or overlevelled opponents. Darkest Lariat and Flare Blitz are great STAB moves. Incinium Z allows Incineroar to easily destroy any and almost every threat, and especially this really helps against Pokemon specifically Molane's Metagross. Thunder Punch and Brick Break are great coverage against Rock and Water types. The only downside is that this thing is slow I'm talking Terry the Tortuga slow, so you have to work around that.
Starmie @Twisted Spoon
Ability: Natural Cure
-Scald
-Psychic
-Dazzling Gleam
-Ice Beam
Starmie makes a pair with Incineroar relatively early game -- you can find a Staryu outside the Hano Resort on Akala Island. Starmie is a fantastic asset thanks to its fighting resistance and base 100 Special Attack. The moveset is fairly standard -- Scald and Psychic are consistent STAB damage, with Psychic also boosted a bit with the Twisted Spoon. Ice Beam and Dazzling Gleam are helpful coverage moves. Natural Cure is decidedly better for in-game use since Illuminate is useless. If you'd rather not use Staryu until it evolves, you can just use a Psyduck until then you can find them also in Sandy Cave on Melemele Island.
Hawlucha @Expert Belt
Ability: Unburden
-Acrobatics
-Poison Jab
-Roost
-Flying Press
Hawlucha is another early encounter that ends up being overpowered later game. Hawlucha's base speed is nothing to be joked about, and this thing being able to set up Swords Dance and having Roost just makes it even more powerful. Poison Jab is on here for coverage against Fairy types and Flying Press destroys Normal, Steel, Dark, Ice, and Rock types. This Pokemon makes your playthrough experience more enjoyable and much easier.
Flygon @Soft Sand
Ability: Levitate
-Dragon Claw
-Dragon Dance
-Earthquake
-Stone Edge
I'll just let Fizz explain this one.
Found at Haina Desert on Ula'ula Island, Flygon is another Pokemon with some good pace and power to it. Though base 100 is pretty average nowadays, Earthquake's high base power and Dragon Fang help Flygon keep its damage output up. Dragon Claw is a good STAB that pairs with Earthquake for good dual STAB coverage. Stone Edge gives Flygon a response to Ice-type Pokemon, and Dragon Dance allows Flygon to set up and sweep opposing teams should it find an opportunity. Great way to deal with Hapu's Grand Trial. Garchomp is also a good option here if you want to SOS chain a Gabite.
Mimikyu @Mimikium Z
Ability: Disguise
-Play Rough
-Shadow Sneak
-X-Scissor
-Swords Dance
Mimikyu is easily the best Fairy type other than Primarina in USUM. Mimikyu makes stalling easy and is great for some difficult battles (coughcough Ultra Necrozma). Play Rough and Shadow Sneak are great STAB moves and X-Scissor is great for Dark, Psychic, and Grass types. Mimikyu makes your playthrough much, much easier and gets the job done as a replacement for Primarina or Sylveon.
Snorlax @Leftovers
Ability: Thick Fat
-High Horsepower
-Heavy Slam
-Crunch
-Return
Snorlax is another great early game Pokemon. This thing is obviously going to be used as a tank but, he can be used as a great physical attacker as well. High Horsepower is amazing for Rock, Steel, Fire, Electric, and Poison. Heavy Slam hits hard against Rock, Ice, and Fairy and is great overall. Crunch is good for Psychic and Ghost and Return is well... Return. In conclusion, this thing can be used as a tank and a physical attacker and overall it is just an amazing Pokemon and a good final edition for your team.
That's the team. Hope you enjoy using it or just think it's a good team. Thank you for reading!