Did my first Gen 8 battle against one of my friends and won 3-0 with this team:
Lucky the Cinderace
Pyro Ball
High Jump Kick
U-Turn
Court Change
Ferrothor the Ferrothorn
Power Whip
Pyro Ball
Stealth Rock
T-Wave
Strawberry the Clefable (with Life Orb magic Guard)
Moonblast
Thunderbolt
Flamethrower
Moonlight
Nifty the Scrafty, the only mon that didn't get use but could have went in if it wanted.
D-Dance
Drain Punch
Crunch
Ice Punch (and the kid has quite the Moxie)
Fidel Gastro, the Commie Gastrodon
Scald
EQ
Clear Smog to say fuck off set up mons
Recover
Slash the Toxtricity
Overdrive (not the bad wrestling move)
Volt-Switch
Boomburst
Sludge Bomb
I didn't look or care about tiers, just made a balanced team which I liked. I think the types line up decently well with a good mix of speed and bulk and capable of keeping pressure on my opponent. MVPs of the battle were Clefable and Gastro. Clefable cleaned it up at the end because it hits like a truck, and early game Gastrodon took out three mons as a wall because I predicted her to Dynamax and Dynamaxed the same turn, meaning I got to set up rain turn one with the water max move, raised special defense turn 2, and hit a rain powered water max move to get a KO on a Corviknight at most its health.