i've tried using scream tail in the past, but it's just too passive. it usually ends up being just kind of a support blob that makes no progress and that doesn't work this gen. it doesn't really have a good way to take advantage of encore turns without gimping your own momentum alongside your opponent's, mola's so good as a wishpasser that any other wishpassing tech is rendered bad by merit of not being mola, atales is way better at screens and screens fell off anyway, pult does fast twave better, a ton of mons do fast (or bulky) rocks better, and most of the other things scream tail can do are covered by hatterene. the biggest problem with the mon is that it just does no damage. even most stallmons have ways to do damage—either they have toxic, or some other form of passive damage, or body press, or some form of setup, or just a serviceable attacking stat in general. you gotta really distinguish yourself, like alomomomola, if you want to succeed with a damage output that low.I don't wanna clutter up with a bunch of low tier mons, this is OU after all, but I'll ask opinions on how Scream Tail might fare nowadays (still an OU relevant topic I suppose). Fast, bulky, plenty of support, Wish passing, perish or Encore to stop setups, Screen setting. I'm just spit balling here but now that things seem to be settling down despite the troublesome mons being spoken about, off-meta counter picks looks to be in season, and it may have a niche I'm too lazy to explore.
Like Clefable with more support.
that being said.
scream tail has the capability to boost either one of its defensive stats or speed with protosynthesis if you tailor its evs right. this gives it a lot of flexibility, in theory, on sun teams. it's much faster and much bulkier than current sun staple hatterene, so if you're confident in dropping some hazard control from a team structure that desperately needs hazard control (advice: do not do this), scream tail can serve as a hatterene alternative that improves on all of hatterene's defensive matchups and simultaneously acts as speed control, another thing that sun very much likes to have. with full speed investment and protosynthesis active, scream tail outspeeds booster iron moth and anything slower, which lets it spread paralysis against offense a lot better than hatterene can and set you up for an easy sweep with one of your breakers. it can also do cleric stuff with wish or set screens if you want, but both of those dip pretty heavily into momentum, and that doesn't gel well with sun. you could also ev it to boost a defensive stat and outspeed key benchmarks like tusk or kyurem if you'd rather have a sturdier switch-in to whatever the rest of your team doesn't like switching into. all of this is still probably not worth trading off magic bounce for, but don't let that stop you