Entree Link:
This is not just a place to pick up your Dream World Items and Mons this is something you should be using.
Now lets use it like you should be doing:
The following is for Black/White 2 and is not possible on b/w (unless you have 2 copies of b/w and 2 DS consoles. In which case b/w is even better, if people are interested I'll do more details on that game).
Firstly upon entering the Entreelink you will see a small tree surrounded a glowing circle which has a bridge over it leading to a Blue plack at the base of the tree. This is the hub console for Funfest Missions and Pass powers.
Top screen will give your Entree lvl, Black and white lvl and pass powers availble. At first these will all be lvl 1 or limited.
Bottom Screen will have three choices "Accept A Funfest Mission" "Receive Pass Power" and "Check Records"
Accept a Funfest Mission
You can do these solo
I am not going to bore you with a full list as that can be found at
Pokémon Black 2 & Pokémon White 2 - Funfest Mission. This is a guide purely about abuse.
So here is a list of the ones to bother with (ofc if interested read the list and try them all as those mentioned do give a few good items)
The Super Two:
"Find Shards" - a 3 Minute mission that gets you 10-15 shards a time when played solo. It is unlocked automatically when you defeat the champion. I advise riding from PWT to Join Avenue as the best route for finding loads.
"Find Mysterious Ores!" (Black only) or "Find Shining Ores!" (White only) - 5 minute mission for loads of shards and elemental stones (dependant on which game). Unlocks after been in Chargestone caves. I advise Starting in Lentimas Town and going round Reversal Mountain for max scores (use repels).
So that is a life time supply of Move Tutor shards.
The leveling your Entree Tree and pass orb hoarding one:
While the super two are great they have stupid requirements and are almost impossible to pass at lvl 3 alone. This means they aren't very good for leveling up your entree as that is based roughly on pass orbs received upon successful completion.
The mission you will want to do is "Find Lost Items" - it requires a score of 20 on level 3 and I get 25-30 every time giving a ton of bonus pass orbs (10 + 20 bonus ones). This mission is given upon beating "collect the berrys" lvl 1 which you have from the start
Ok so thats the Funfest Missions sorted. You should now have knowledge to get loads of orbs, lvls and items.
Receive Pass Power
This is what you will be using all those Pass Orbs on and why you will be wanting to level your tree up.
How pass powers work is that on this screen you can select any three. Those three are then useable at any time (even in black tower etc). You can swop them whenever you want dependent on which pass powers you will be needing.
You activate powers by going to the C Gear and selecting the central button (the one that should say connected and have a load of dots on it). This should bring you to a Green Grid Screen which if you have any friends around will show them. Now at the very bottom of this screen is a small green downwards facing arrow. This will give you a screen where it will show your current number of pass orbs and your currently selected pass powers which you can activate for bonuses.
Now I am not going to lie to you. Unless you have 2 DS consoles and a copy of b2 and w2 you are not going to have all the pass powers since to get the other versions pass powers you have to join their active funfest missions. For having a Black 2 Entree Level of 16 gets you the double exp 3minute pass power and the double battle winnings at lvl 26 pass power allowing you to rack in loads of exp and dough on black tower runs. On white you get hatch speed and dust cloud rates etc. A full list of powers can be found below.
Pokémon Black 2 & Pokémon White 2 - Pass Powers
Yes it is extremely annoying for White 2 players since they basically get only Hatching and Dust Cloud respawn rates while black 2 gets money, exp, encounter rates and even shop price reductions. I did warn you.
While 3 minute powers might not sound much. You have to remember these powers are spam-able and have no cool down and it only takes 10seconds to activate them and they do not expire mid battle plus on things like hatching you only need 2 minutes for any egg if you have flame body and hatch speed going for any egg.
Oh and the 1-50 thing in 10minutes. Exp Share a lvl 1 pokemon in Black tower lvl 10 while a lvl 90+ pokemon only shots everything. If you really want to rofl put a Lucky egg on a traded for Lvl 1 pokemon, activate exp power and switch in a high lvl with Explode then blow it up that is lvl 1 to 50 in one battle or two battles if its your own poke.

90k to 150k exp in one fight easy