(Original post)

That depends a lot on the people in the motel. The majority of motel dwellers will not come investigate. It’s dangerous to go too close to humans, and most will only pay enough attention to make sure that there is no one onto their presence. 

Some, like Walt, would at least travel to the room to make sure that the earthquake wasn’t a precursor to the humans breaking into the floors or the walls.

Not sure if he’d appear in the crossover, but there’s nothing stopping him from popping up at some point in Brothers Lost. Tiny Dean and Bowman would make quite a pair, and I can’t imagine the snark would ever end. Dean can’t pocket Bowman to solve his problems anymore. Now, he’s pocketable as well, so they better behave themselves or Sam will be encouraging Jacob to pocket them while he stays the lookout.

Dean meeting a small version of himself will always have his hands full XD But I can’t help but think how cute they’d be working on the Impala together. Big Dean has a little version of himself that knows all the car stuff he knows and is able to fit into all the tiny corners of the car, and little Dean has a big version of himself to boss around if he needs to move something heavy and they’d probably be on the same wavelength the entire time because c’mon. It’s their baby. She must be treated right.

I’d say it certainly isn’t out of the question! It’s a fun idea to muse, and it would certainly make a few ideas I have possible. There may be crossovers between the various AUs in the future, and this one has great promise already XD I think it’s the tiny Dean. He puts the spice into their lives from being a little spitfire.

BL Dean will be a little jealous that BA Dean can just go to the store and buy himself some pie though. Hell, he’d probably get a slice from those humans around if he even mentioned that. Guilt the tols into giving pie.

There’s a thousand possibilities for how it could happen! XD Just imagine BA Sam running into a tiny Dean in the walls and doing a double take. How did his brother get so small?!?! 

The BA’s won’t have the sensing thing as completely as the BL’s. Their little knacks come from the curse Celeste put over them (a little bonus for losing their size, something to increase their survival chances). BA Dean might be a little jealous that his tiny counterpart can track down pretty much anything if he figures out that he needs it.

The BA bros teamwork won’t be as seamless as the BL bros because they spent half of their lives separated while the BL bros have never been apart. The BL bros are also a lot more dependent on each other because of this, and stress more if they need to separate for long periods of time. Jacob will notice this if he only has one brother around.

XD BL Sam certainly has keeping Dean in line a lot easier than BA Sam. He can haul Dean around all he wants while BA Sam has to figure out how to keep his giant of a brother calm (or rile him up more).

They have their Deans cheat codes.

Ahaha. Well that all depends on if BL Dean has his baby or not. Jacob’s Mercury is nice, but it just isn’t the same as the Impala. Sam will suffer through an old rock binge either way. But with the Deans…

BA Dean is probably going to chase Jacob off since he’s like 6′5″ and who the hell does this kid think he is. Meanwhile BL Dean is all puffed up and offended that anyone is ordering his Jacob around, doesn’t Dean know they’re working on training him? Jacob’s in the corner watching BA Dean curiously poke the tiny version of himself, wondering about how tiny he is, while Jacob’s shaking his head going “I wouldn’t do that if I were you…”

“OW! Sonovabitch…”

And everyone just stopping when they find out that tiny Dean decided to take matters into his own hands to dissuade the pokes just like he did when Jacob caught him and now Jacob has to separate those two or at least get his tiny Dean off the table…

Cue tiny Dean bitching at big Dean from a shoulder and that’s where they get to “My human’s bigger than your human…” and suddenly tiny Dean is a lot like a squirrel. He’d even throw stuff from there if he could to get his point across.

Sams are just sitting back and watching the show, and if anyone mixes up their Sam, they’ll let them know. There are differences between the two that Jacob will probably pick up on. Sam in BL doesn’t have his human older brother to help him out with figuring out humans, so he’s a lot more shy. Dean might not notice this as fast since he’s offended that the little version of him just used a knife on his finger. How dare XD

Eventually they’ll all settle down and yep. Pie. Tiny Dean would be jealous big Dean can eat an entire pie in one sitting. At least they can agree on liking pie.

What everyone should really worry about is if the Deans decide to start working together….

XD Oh lord. The Deans would be so suspicious of each other at first. Why does that Dean get to be tall? That’s not fair! And tall Dean would probably be curiously nudging at the little version of himself, making BL Dean puff up indignantly and try and brush him off and just not get anywhere because seriously BA Dean why are you so tall.

BL Sam would be so curious and asking him a million questions while BA Sam is following BL Dean around. Big Dean would end up with his shoulders full because clearly tonight is now a movie night and he must give in to what all the little guys want to do.

Mush.

I have a feeling those little guys would end up with pie, but they’d get out of the room as fast as possible regardless. It’s dangerous to be around any humans, and they might seem friendly, but it’s better to be safe than sorry.

None of that would stop Dean from coming back to their room later on and demanding an explanation for all of it. How do they know about little people like him? Do they plan on trying to find anyone else in the motel?

He’d want to make sure the others at the motel weren’t in any danger before letting his guard down.

You can count canon Jacob in with the friendly humans too. Bowman has bopped those lessons into his head many times. We’ll just have to see if Sam and Dean do the same with Jacob the drifter.