I second this, this strategy is inherently unfun and forces teams in to specific counters, such as the Heatran set posted above.I really hate to post twice in a row, but GaG Zamazenta is getting out of hand.
The only consistent viable counter to GaG Zamazenta is GaG Zamazenta itself. Given a standard moveset of Victory Dance, Iron Head, Leech Seed and Substitute, we are looking at around 70 turns of PP stalling since the set is a wall to itself. The Heatran set Gum Buddy mentioned works and all, but a base 77 Speed is a big nope.
Here's some replays of just the most horrid stall in fathomable BHG9 existence:
I remember Akira and I were fighting one time and we came to the agreement to pretend that both our Zamazentas had fainted because neither of us wanted to play 70 turns of PP stalling. This type of agreement works between people who are higher in the ladder, but for new players it can be really discouraging. Imagine hopping on BHG9 with a Desolate Land + V-Create set thinking "Man, I love this set. I can't wait to sweep everyone!" and some 1100 player comes along and hits you with the 70 turns stall. Not only is this not healthy for the meta, but also the players of BH overall by creating an uncompetitive space.
I cannot stress enough how much of a problem this has become recently. Unless your running Double Steel types with Regenerator/Unaware + Pivot, you're going to have a hard time breaking Zamazenta without whittling down it's PP. Victory Dance, Good As Good or Substitute must be considered soon as they are the keystone in keeping this set alive. Personally, I am in favor of a Substitute suspect/ban because the amount of prolonged battle strategies achievable with Substitute is unreasonable.
Thank you for listening to my rant about the absolute state of Zamazenta. Have a good day and I hope your battles aren't as painful as the ones above.
This is simply describable as overcentralizing and action should be taken. But I disagree with you in that Sub is the main culprit here.
Good as Gold is the issue. Of course, over the course of BH’s history (Ignore the Gens where Shell Smash and Belly Drum are allowed.) Bulky setup has been a very effective strategy, since the combination of QD (or VD instead this gen) + Defensive Stat boosting ability allowing the user to both be a wall and an offensive threat at the same time.
This is usually kept in check by multiple factors such as Haze, Status, Spectral, Phazing and Imposter. This is where GaG comes in, as the ability allows the bulky setup mon to circumvent one of its flaws in Status, Phazing (with the help of Substitute) and Heart Swap (People might not use this but this has some potential.) GaG also allows it to utilize Leech Seed and beat offensive counterplay by clicking Leech Seed as counterplay comes in and then spamming sub until counterplay is in damaging move of crange.
This combination forces people to, no matter what they are running, to utilize some sort of hard counter, that outside of this matchup is mostly outclassed by other better mons.
TLDR: GaG is unhealthy and forces unoptimal mons with half optimal sets on to teams just to beat this strategy or locks half of your team in to the same 3 mons. This isn’t worth spending time suspecting.
Suspect Tera by the way.