Here are recommended builds for each playable Pokémon.

Venusaur	Sludge Bomb	Solar Beam	Focus Band	Shell Bell	Wise Glasses		Charizard	Fire Punch	Flare Blitz	Muscle Band	Buddy Barrier	Energy Amplifer
Pikachu	Electro Ball	Thunderbolt	Energy Amplifer	Shell Bell	Wise Glasses		Alolan Ninetales	Dazzling Gleam	Aurora Veil	Muscle Band	Wise Glasses	Buddy Barrier
Wigglytuff	Sing	Double Slap	Buddy Barrier	Shell Bell	Wise Glasses		Machamp	Submission	Cross Chop	Muscle Band	Focus Band	Scope Lens
Slowbro	Surf	Telekinesis	Buddy Barrier	Shell Bell	Focus Band		Gengar	Sludge Bomb	Hex	Special Attack Specs	Shell Bell	Wise Glasses
Mr. Mime	Confusion	Barrier	Energy Amplifer	Buddy Barrier	Wise Glasses		Snorlax	Heavy Slam	Block	Buddy Barrier	Focus Band	Score Shield
Gardevoir	Future Sight	Moonblast	Energy Amplifer	Shell Bell	Wise Glasses		Absol	Pursuit	Psycho Cut	Muscle Band	Focus Band	Scope Lens
Garchomp	Dragon Rush	Dragon Claw	Muscle Band	Focus Band	Buddy Barrier		Lucario	Power-Up Punch	Bone Rush	Muscle Band	Focus Band	Buddy Barrier
Crustle	Shell Smash	X-Scissor	Buddy Barrier	Score Shield	Focus Band		Greninja	Smokescreen	Surf	Muscle Band	Focus Band	Buddy Barrier
Talonflame	Flame Charge	Fly	Focus Band	Score Shield	Scope Lens		Zeraora	Spark	Discharge	Muscle Band	Scope Lens	Energy Amplifer
Cinderace	Blaze Kick	Feint	Muscle Band	Scope Lens	Buddy Barrier		Eldegoss	Pollen Puff	Cotton Guard	Exp. Share	Focus Band	Buddy Barrier
Cramorant	Hurricane	Surf	Buddy Barrier	Shell Bell	Wise Glasses		Blissey	Hurricane	Surf	Buddy Barrier	Shell Bell	Wise Glasses