Please note that despite all these differences, we still follow the gen 5 type chart (No fairies, Steel keeping multiple resistances, rip poisons).

Movesets:
Generally gen 8 learnsets- gen 7 where that isn't applicable, with gen 5 moves. As some examples:

Hurricane Kingdra, but no Flip Turn
Multiple mons with Close Combat (Through TM) and a few other moves

Exceptions: Draco Meteor Hydreigon and Swords Dance Garchomp, both unusable

Event moves are accessible through the Battle Frontier tutor, using BP.

We also have updated mechanics for most things- moves, abilities, and mechanics.- limited weather, moves like Rapid Spin with 50 bp + 1 spe, pois not missing toxics, Inner Focus/Oblivious immunity to Intimidate, etc. This includes things like Hidden Power's BP change (all 60).

Last bit before nerfs, we do *not* have access to Hidden Abilities atm. They're going to be coming with Dungeons, and if you're interested in that then I suggest looking at this thread: https://bit.ly/3xGrwGW

Move Nerfs:
Aside from these, there are a few different move nerfs. Outrage has 90 bp, Knock Off has gen 5 bp (20), and Baton Pass doesn't pass stats (But is still usable as neutral priority switch and giving Sub/FocusEnergy and other benefits to others)

Ability Nerfs:
Shadow Tag has a 3 turn limit, while Wonder Guard has 3 maximum uses as well.

Mon Nerfs: Dugtrio has his gen 5 base attack.