Ok, so we've all been throwing out a lot of random Pokemon with no cohesion for the last 29 pages, and I think it's about time we started to think of some real possible BL candidates and try and discuss them a bit.
Here's my current opinion on the tier. (Note that these Pokemon are not in any particular order.)
More Than Likely Need to be BL:
Abomasnow: If it didn't have Snow Warning, then I wouldn't be at all impressed with this guy, but the fact that it does is the one reason we should send this guy to BL. Being able to support Stallrein, as well as Substitute / Spikes Froslass @ Brightpowder for an entire game says gg to the majority of teams not dedicating a significant amount of their team to stopping it. Although my first sentence isn't to be misleading, it packs a huge punch with Wood Hammer / Blizzard, dual Base 120 STAB is nothing to scoff at, and with the correct EVs it can be incredibly bulky from the Special Side.
Spiritomb: Let's face it, with its defenses, resistances, status attacks, ability to stat up and sweep, this thing is probably THE biggest defensive threat to the tier. I equate it similarly to something like Lugia would be to the OU tier. It's not at all difficult to get 6 Calm Minds and completely destroy a team, and with the only real way to hit being hard, and from the Special side (considering you could very well be completely neutered by Will-O-Wisp) it's just too much for the tier.
Gallade: With the above gone, there is nothing stopping this at all. Ice Punch / Shadow Sneak / Close Combat is all you need coupled with a Swords Dance and you're golden. This, along with the Pokemon below is probably the #1 offensive threat.
Staraptor: Ok, this is why you need 2 Normal resists MINIMUM per team, as well as a Fighting resist who isn't neutral to Normal. This thing is single handedly destroying teams, and it doesn't even need to wait for the team surrounding it to help. Its own unique movepool allows it to take its own counters out all by itself. The only Pokemon I have seen counter this beast 100% is a HEAVILY defensive Luxray used by Eo Ut Mortus. Brave Bird / Close Combat / Return is all this guy needs and with U-turn to scout out your opponent's "counter" it's just a matter if when, not if, this Pokemon sweeps you.
Crobat: I know what you're thinking, "what? Crobat for BL?" but let me explain first. This Pokemon is the definitive lead. Its ability to shut down other leads with Taunt, as well as its ability to set up Weather for your team is absolutely broken. With such great weather abusers such as Typhlosion and Ludicolo running around in the tier, it's a wonder why this hasn't been mentioned before. I thought we determined with the Deoxys-S vote that fast, guaranteed set-up for no cost was broken, and this guy defines that for UU. Not to mention that with Brave Bird giving huge base power, you don't have to invest in Attack to have a usable attack. And his defenses are far from paper thin, only getting better because of Roost. I personally think this is one of the most harmful Pokemon in the metagame at the moment.
Possibly BL:
Shaymin: While it's true that Grass is a pretty bad STAB in OU, it's actually a really good one in BL. There are a ton of underused Bulky Waters and Grounds that are floating around, and not a lot of things to resist the type are hang at the UU level (as most Flying types and Steel types are either really good and therefore OU, or really bad and therefore NU). With Natural Cure to get rid of Status on leaving, it's also ridiculously long lasting as once you get into the danger zone health wise, you just Rest and switch out. This also allows Shaymin to run a Life Orb for the added power. With Earth Power / Air Slash to hit Steel / Fire / Grass types for Super Effective damage, this thing is a bit much for UU.
Typhlosion: People will think that I'm advocating Typhlosion's banning because of the Choice Scarf set, but that's entirely untrue. It's actually the Specs set that is the most broken. Base 100 Speed is a really good speed to hit in UU (just look at Staraptor), and that just so happens to be Typhlosions speed tier. With a Specs boosting its already impressive Special Attack stat, as well as Eruption's godly base power allow it to literally KO everything not named Regirock / Milotic / Slowking / Azumaril / Chansey (and actually chansey is 2HKOd some of the time with SR on the field.) Even things that resist Eruption are 2HKOd in the majority of cases (Hariyama and Slowbro come to mind). And if you're running Crobat, keeping Stealth Rock off the field long enough to bring in Typhlosion once is easy enough, but even if you're not using Eruption, Choice Specs Fire Blast still puts a dent in a LOT of things. And for those saying "it's a specs user, just beat it with prediction" ... it's not even using anything except for a Fire move. There's no prediction involved.
Raikou: It's no surprise that this is on the list, the only reason that I"m not certain that this is BL is because people seem to be so afraid of it that they're preparing for it in a lot of weird ways and so it's not performing as well as it could be. (I saw someone use a Gastrodon solely for Raikou, even though otherwise Gastrodon is horrible in the tier.) Its speed, coupled with its bulk allow it to get at least a single, if not two Calm Minds and from there, it's a simple sweep.
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Other than these eight Pokemon, there is currently nothing in the tier that greatly sticks out as "hey, look at me I'm broken!!!"
Let's try and discuss these Pokemon, and maybe put some more on the list that I may have forgotten.