The worst thing is there's no reason for Kyurem-Black to invest in Speed, since it will outspeed anything that doesn't, itself, Shift Gear or similar, so it's also obnoxiously bulky, between its actually decent bulk and the fact that it can just invest in HP.
Also, keep in mind the Mega Aggron calc is in part because Teravolt lets it ignore Filter. Still ridiculous, but less so than it first seems.
In the case of Dragons, only Dialga has to actually suffer from a lack of SEmons Dragon moves.
In the case of Ghosts, only Sableye and Spiritomb have to suffer form a lack of SEmons Ghost moves.
Oh, sorry about that. Yeah, I'm just gonna be simple and ban Kyurem-B.
You going to update the OP with bans?
idk if anyone mentioned this yet, but from my experience, meowstic is basically the "stabmons sableye" of this meta, gaining quiver dance, dark void, parting shot, heal order, topsy turvy, sticky web, knock off, and more, its really threatening, with both bulky sets, and even more offensive ones with quiver dance. possibly the best prankster user in the meta.
Yeah, it's been mentioned. Mega Banette is
also the "STABmons Sableye" of the meta, but is basically strictly inferior to Meowstic for such a position, lacking the Bug moves and having inferior bulk and Speed. Much better Attack, but eh. Meowstic
also has innate access to Assist, meaning it can do Prankster V-Create and the like.
Riolu deserves an honorable mention, thanks to its access to Prankster Psychic moves, unique among Pranksters. Heart Swapping for stats is probably inferior to Topsy-Turvy-ing a setup enemy, but eh.
Other Pranksters can do some interesting things. Liepard can do a Prankster Geomancy backed by Secret Sword, for instance. 80-something Special Attack isn't half-bad.
But yeah, Meowstic is probably king of Pranksters in this meta. Thundurus has a cute trick with Prankster Haze, and the ability to Prankster Stealth Rock certainly has some kind of utility, though honestly it's probably happier with the fact that it doesn't need Hidden Power Ice and can instead run Ice Beam/Freeze Dry.