Sorry for the double post, but I got thinking about STABmons some more.
I really think Shift Gear Jirachi and Lovely Kiss Lopunny need to be looked at. They're on almost every single top team and they rely completely on luck.
I don't understand why anyone would want SG Jirachi in the game. The only good things that it does are check KyuB and check ESpeed. There are a few pokemon that it can't reliably break past (namely Heatran and Slowbro), but the rest of its checks either get wrecked by coverage or just flinched to death. At the expense of sounding really salty, I refuse to ladder anymore just because I've lost to this so many times, not because I played poorly or because my opponent did something crazy, but just because it flinched 3-4 of my team to death for free. There's no counterplay to be had (don't say thundy/sableye because lum + ice punch/play rough/moonblast breaks them, and Jirachi doesn't lose anything by switching out anyways). In my eyes, it doesn't really matter how hard I prepare for Jirachi if it comes down to almost nothing but coin flips and Kings Shield 50/50s.
I hate to use this word, but Lovely Kiss is uncompetitive in a similar vein. I have several replays of me against top level players, where Lopunny the whole game comes down to a 33% roll on sleep turns. Lopunny loses to Gyarados, Landorus, and M-Slowbro UNLESS it gets a 3 turn sleep. They all get 2hko'd by a +4 ESpeed, so nothing special is needed to break them.
"Why don't you use two of the aforementioned pokemon?"
That's ridiculous and I shouldn't need two defensive checks for one pokemon, especially when its offensive checks are prone to getting bopped by Fire Punch or Drain Punch.
"Why don't you sleep fodder something first?"
To reliably sleep fodder something, I have to sack something, put in my defensive check, double out on Lovely Kiss, and then triple back in to Lopunny, which puts me at 1 fainted, 1 asleep, and 2 rounds of hazard damage on my wall for no gain. Or maybe they just don't run Lovely Kiss and I take a whole lot of damage for literally nothing.
"Why do you just sit there and let it set up?"
Because I have a 2/3 chance of getting a free kill, and switching out doesn't actually put me in a much different situation than just staying in and playing the odds.
I think Lovely Kiss is really the problem here. It's quite similar to Dark Void: it's a VERY fast, accurate enough sleep move that hits indiscriminately and has really wide distribution.
"you letting it setup on you?", or,
"why are you letting it setup on you?", or,