There most likely won't be a format like that, but if you don't care about having a ladder and only about playing with friends or even room tours, you can manually remove the clause by using custom rules when challenging someone or creating a tournament.
It is under the Github link and getting used to it is very useful!
/challenge gen8ubers @@@ !Dynamax Clause
I don't think this is the right thread for this kind of question, you should rather gather opinions on the Ubers discord or the PS! room then ask Nayrz or another forum mod before making your tournament.
Previously, teams were was worse off when dealing with Zamazenta in DLC 1 where it had around the same viability as regular Zacian, because the general fighting resists were things like Phys.def Eternatus which were destroyed by its solid coverage. Now however, it's easier to to deal with both offensively and defensively. Calyrex-S is immune to its STAB and resists psychic fangs, and is a very solid way to offensively cover it. Zacian-C is currently the best mon and outclasses it so lot harder now due to meta changes and it now running more sets that can break its checks so Zamazenta isn't needed as a breaker for those, Kyogre outspeeds and revenges with scarf, Xerneas lives hits and revenges or uses it as set up fodder, Zygarde is typically a stone wall with defensive sets, Ho-oh can pivot, etc.
The defenses are decent on it, but the resistances mentioned don't actually impact it all that much, as out of those 9 the only type that a mon would likely rely on for all its damage output is dark with Yveltal, which can also just uturn out. Unless you're Zygarde-C, Giratina-A, tyranitar, or some other insanely fat mon with a good support movepool that can also hold an item, rest generally isn't a great form of recovery, especially with how poor Zamazenta's support movepool is consisting of pretty much nothing outside of rest which isn't great. Offensively it can't do much either with it lacking an item slot and meaningful coverage / set up options, so if it does manage to be a resting wall it can't support or deal any good damage.
You can invalidate the focus sash with entry hazards and the like. Barring that Yveltal switches into it well (specially defensive variants can take two +2 draining kisses), and if you break the sash you can revenge kill it with a variety of scarfers like Calyrex-S and Kyogre (also Marshadow).
Oh Ok, Thank You For The Tips :D
They play entirely different the introduction of Zacian, Calyrex-S, Heavy Duty Boots, removal of Arc forms etc. Being good at one doesnt necessarily mean you'll do well in the other and vice versa.
Shuckle provides the unique distinction of carrying Stealth Rock as well, which eases teambuilding complications and has the nice benefit of rendering Focus Sash pokemon hoping to halt a sweep from one of your hyper offense pokemon completely useless. The main examples of this rule include Marshadow and Calyrex-Shadow, who frequently carry Focus Sash.
