Stabmons NU threats:
Yanma is a beast, but checks aren't too hard to come by. Just don't let it get off a tail glow and you'll be okay. With a tail glow boost and oblivion wing recovery, however, this thing is very hard to take down, and you really need to be careful when playing it as it can sweep at a moments notice.
Luxray has tons and tons of power, almost ridiculously so. This is like sheer force rampardos with boosted head smash w/o recoil in OU (which doesn't exist). Luckily its slow and easy to revenge kill, but don't switch in anything other than bulky grounds (and watch out for facade).
If Barbaracle can get off shell smashes, it can easily win battles; it couldve easily destroyed lcass' team had i been able to set it up. Barbaracle is a beast now that it has decent powered stabs, and while diamond storm doesn't get boosted by tough claws, crabhammer HURTS. It is also decently bulky for the tier.
An odd surprise, Simipour is a decent spout abuser with specs, having tons of raw power and gaining both grass and ice coverage. It has good speed and outspeeds most of the unboosted tier, but be careful for yanmas getting sneaky and trying to get off tail glows.
Liepard is the tiers sableye (well not quite), posing parting shot, memento, encore, taunt, and all kinds of other gems. Its a nice pivot, and although it has no bulk, can do pretty well with a sash.
Scyther hits very hard. Its pin missile will hit for 150 power on 3 hits. Yeah, thats doing a lot of damage, idgaf if its from a bug. Best if you are not using yanma, however. With an eviolite it also has decent bulk, so you could easily set up with it.
Electivire is my scarfer, and I am not disappointed. One of its drawbacks previously was the lack of a strong physical electric stab, but that is fixed in the form of bolt strike. I love it as it can also revenge yanma at full health (as long as no tail glow).
Thats about all I have experienced so far, so yeah. Fun tier though, battles last about a minute lol