It's worth mentioning that there's a hold Item that boosts the stats of unevolved Pokemon too. We could even have a scenario where NFEs get into OU.
One question though. Does it boosts ALL stats or just for example defenses ? Or there are two items - for defences and for offenses ? I'm just curious, as it gives some interesting options. Gabite with this item in lower tiers may wreck - STAB Outrage + Dragon Claw + Earthquake with 1,5 boost (I hope it gives at least 1,5 bonus) in physical attack for example sounds good. Monferno may also receive some neat boost for his Nasty Plot set. And of course some defensive NFE behemots like Porygon2 (guys, Porygon2 may be surprising counter to few attacking behemots with boosted defenses), Chansey and Dusclops. I always like idea in using competitive some NFE pokemon in UU or NU and now they may really shine if this item has good enough bonus.
Are there any pokemon that look like they instantly qualify for the lower tiers, just by their BSTs?
Pure theorymon time, however there are few.
Swanna - Water/Flying is neat typing, but not with this BST. It has too weak defenses, only decent stat is 98 speed and... that's it. It would need to have Smeargle like movepool to make it somehow OU.
Dasutodasu - It has just too weak defenses to wall this ridiculous stuff. Also when your best stat it 95... I just can't imagine this being viable in higher tiers.
Emonga - well, no need to explain IMO.
Tsunbeea - I love design of this polar beat, but it's terribly slow (50 speed) and 110, while it's good, it's nothing game-breaking. Also switching with Ice type on battlefield will be pain in the ass...
Baffuron - To be honest I'm mostly dissapointed with this guy. IMO it looks like a weaker version of Tauros. While it has decent 95/95 physical defense and solid 100 attack, it would need to have PHENOMENAL movepool to somehow make it OU. Also lack of good resist hurts like hell and unlike Tauros it can't abuse Intimidiate when switching in.
Miruhoggu - Emmm... I can't imagine it being viable, I just can't. Maybe, again, with Smeargle like movepool, but I don't think he'll have it.
Zuruzukin - It has beatifull typing, Dark/Fighting sounds just great. But it has one problem - mostly in offense way. 95 physical attack, 45 special and this sad 58 base speed makes it sad. It has solid bulk, but this 65 base HP doesn't help here. IMO max UU and I'm not sure of it. But maybe he'll have special item like Marowak, who knows... if yes, there's hope for this guy ;).
EDIT:
LOL, so in other words Shanderaa doesn't have 145 base special attack, but... Special Defense. Ok, this is something that totally change things here. Blissey, Snorlax and Heatran for now totally wall it. So no more danger here :P.
And lol - Ononokusu has only 70 base speed ?! Wow, actually it may stay in ;).
Gosh, so many mistakes... Shubarugo doesn't have 20 base speed, but... special defense ?! And it goes on... And my theorymon from this post just go to waste -_-