Battle Week was pretty easy, could deff be made harder with more lengendaries/mythicals, maybe more Ultra Beasts and Paradoxes. Also the AI didn't adjust well to certain abilities - for example if you switch in a mon with Desolate Land, Water attacks don't work but the AI doesn't really read that. So it may use Water moves over and over to no effect. Same with Primordial Sea and fire moves
Beat Born and gonna post my team, EV trained and leveled up to 99 or 100, made them all both Shadow and Shiny to get a 15% boost on attacks, and still took a bunch of resets to learn what was going on lol.
Here it is (can look at the game docs if you're unfamiliar with moves or abilities listed):
Role: Adventurer
Partner Eevee
Ability: Evoboost
Hasty
Assault Vest
Moves: Dreadful Drake, Sizzly Slide, Freezy Frost, Flip Turn
(Freezy Frost was still bugged for me, brought it up in the discord and didn't get many answers, but it did NOT frostbite opponents 100%)
Wormadam - Trash
Ability: Scrap Metal
Careful
Leftovers
Moves: Stealth Rocks, Protect, Whirlwind, Metal Burst
Onix
Ability: Barren Desert
Adamant
Eviolite
Moves: Rock Polish, Boulder Drop, Headlong Rush, Flip Turn
Zapdos
Ability: Primordial Sea
Timid
Life Orb
Moves: Tailwind, Thunder, Hurricane, Weather Ball
Blacephalon (used as my Dynamax mon, used Dynamax Candy to get the full meter)
Ability: Desolate Land
Modest
Choice Specs (used Brightpowder at A rank)
Moves: Taunt, Mind Blown, Solarbeam, Hyper Beam
Aerodactyl (my fav mon)
Ability: Rock Head
Adamant
Aerodactylite (used Wide Lens much of the game)
Moves: Dragon Dance, Head Smash, Iron Head, Fly