Lmao, the more things change, the more they stay the same, huh? This is pre-platinum DP all over again, did you also have Toxic Spikes on Toxapex?I know this topic has been touched on by others, but I feel like I need to bring it up again.
Sand Veil/BrightPowder Garchomp is extremely strong, despite how little use it sees. To give some context, with sand up, all 100% accurate moves are 67% accurate. Attempting any move with less than 100% accuracy is a flimsy strategy at best. I know the council does not complex ban, and I have advocated in favor of that sentiment multiple times in this thread, but I seriously think this set should be looked at as something uncompetitive.
(skip to turn 20)
This replay here shows how brutal this set can be. Despite me missing a Scale Shot on a full phys def Mandibuzz, the opponent proceeds to get RNG'd and miss two straight foul plays, allowing me to scale shot twice for the kill. After the opponent attempts pivoting around to try and stop the bleeding, Melmetal proceeds to miss a DIB without sand up, giving me another kill. Then Spectrier comes in a misses a Hex, forcing the opponent to sack another mon.
Was this battle bad luck? Sure. But if we are vying for competitive integrity, I think it would be worth it to at least consider looking into this combination.
Brightpowder, as appealing as it sounds, isn't better than Leftovers as an item, without it, your 'Chomp will die quickly and have less chances to fish for misses with Substitute, if you really want to try this, definitely not PoS set Leftovers is the better choice.
But if you really want to suspect it, I feel Garchomp has been fucked by the power creep generations 5 to now gradually brought, it's stupid, don't take me wrong, but there are MANY things worse that should be dealt with first.