Alright so:
Prankster/Cheek Pouch/Dazzling/Harvest with Starf Berry and Substitute/Protect is
Moody 2.0, and doesn't even have the drawback of reducing one of your stats per turn. You cannot break the cycle. You cannot use priority outside of Mold Breaker Pangoro to fuck with the substitute timing, and even that doesn't work against Trevenant unless you also have Scrappy.
There are three things that destroy this team: Skill Link, Unaware Stall and anything running sound attacks or taunt. Against anything other than these you turn the game into a pure RNGfest - whether or not Harvest fails a bunch of turns in a row, what stat boosts you get, and whether or not a lucky crit breaks your cycle after you run out of substitute PP. And even if these things do happen, since the overall odds are not that bad in the long run, you still have
5 other pokemon that can do the same exact shit, thanks to the very wide availability of Substitute/Protect. You can also PP stall many offensive teams completely out of PP with this technique. Due to the enforced randomness of the playstyle and the inability for the opponent to have meaningful counterplay, I believe that this playstyle is
UNCOMPETITIVE and may require a targeted ban.
Now, Skill Link and stall are both very popular in this meta game, so you might think that this is not banworthy. But do note that I have only mentioned 4 abilities in the header. This represents the 'core requirements' of the playstyle, and there are a variety of Pokemon in the last two slots which can heavily mitigate the issues this team has.
First and foremost is
Stamina, which, as we know, is very effective against non-Unaware Skill Link. Running Mudsdale in one of your two nonessential slots gives you a slightly better matchup against Skill Link, to the point where you might not get 6-0'd. It is still by no means a good, or even competitive matchup, but it does let you survive the first hit and get some surprise KOs to even the odds. Full HP/Defense investment on literally every single Pokemon is highly recommended if you intend to run Stamina, and if you're serious about not instantly clicking X vs Skill Link teams, you should be running Klefki as your Prankster Pokemon as it deals effectively with most Skill Link users. Both Thunder Wave/Foul Play and Subtect/Starf Berry are viable options for Klefki.
Next is
Mold Breaker. Running a Mold Breaker on the team makes the matchup against Offensive Unaware a lot easier, though it still loses to full PP stall since it is hard to get boosts when your substitute doesn't die, and you don't apply enough pressure on stall to stop them from constantly rotating until you run out of PP. But Cheek Pouch recovery gives you enough healing to rotate around rocks and TSPikes indefinitely as well, which can turn matches into contests of patience.
Next up is
Magic Bounce. This is occasionally
useful against offense, and very good against the very rare Taunts in the meta, but it also turns stall into contests of who gets bored first, as most Stall teams cannot do 33% of your health in a direct attack per turn, allowing you to rotate around indefinitely with Cheek Pouch recovery. About as stupid as it sounds.
A gimmick to deal with sound attacks like Scrappy Boomburst is
Soundproof. It also deals with Taunts, which is very useful. Would not recommend using as neither sound attacks nor Taunts are particularly common in a meta filled with Magic Bounce and Contrary boosting, but it's here.
Finally we have
Pressure, which is just stupid IMO, but effective. Remember Vincune, which Sub/Protect stalls teams very effectively using Pressure to run opponents out of attacks that can damage it? Now imagine 6 of them with enough recovery to stall out the full 32 turns of substitute and protect. Considering that I've stalled Contrary Offense out of Kyurem and Victini PP
without pressure, it can get really silly against offensive teams.
I have written this with the intent of convincing the Shared Power tier leaders that this is both a
viable and an uncompetitive playstyle, and I believe that there should be a ban targeted at the playstyle, either
banning Starf Berry or getting rid of
Dazzling/Queenly Majesty which enable this playstyle to exist.
Some replays to demonstrate how the team works and how to deal with teams lacking Dazzling:
https://replay.pokemonshowdown.com/gen7sharedpower-699356182 - My first battle against one of these teams, which inspired me to build a foolproof version. Quick Attack and Extremespeed come in clutch here.
https://replay.pokemonshowdown.com/gen7sharedpower-699370565 - 107 turn battle where I slowly but surely stall out a Contrary Pinsir and the one substitute Victini in existence.
https://replay.pokemonshowdown.com/gen7sharedpower-699376186 - Slightly higher on the ladder, this time up against a Toxic Boost/Guts team.