IMPORTANT UPDATE:
With the announcement of the 3DS XL alot of people are asking questions about transferring data from one 3DS to another. Alot of that information is here - http://www.nintendo.com/consumer/systems/3ds/en_na/data_transfer.jsp

Friend Codes:
Feel free to post your 3DS friend code and i'll update the list.
If you aren't on the list then post here and i'll add you;

mk64 - Tom - 3308-4584-1073
rickj - 1118-1085-9308
Elmlea - 3265-5213-9206
regmcfly - 2234-7232-9528
ayns - 2105-8748-8084
Blue Swirl - 0602-6557-8477
MalOwner -0645-5742-2145
optimark_prime - Marky - 1848-1651-3645
Blaireau - 4596-9969-8504
Pandajimmy - 2809-8024-1882
EvilRedEye - 1590-4867-7427
b0ris - 5327 - 2209 - 8260
Nina - 4296 - 4234 - 0289
Workid - 4725-9249-6970
scout - 1418 - 7908 - 3092
Barren_sky - 1719-4466-8494
Speedhaak - 0173-2593-6361
Hodgepodge - 0001-3575-4341
mrsmr2 - 2981-5706-4054 
Birdorf - 4382-3173-0928
SLEdge - 4398-9256-7611
Tempy - 2793-1832-4451 
MattyJ - 4313-0452-3409
Sas - 3926-4952-0699
Kollarn - 2578-4328-8315
MinkyMu - 1650-1725-7090
Retroking1981 - 4210-3980-2083
woodimari - 0275-7830-6131
revelthedog - 0146-8922-2426
Isanbard - 0361-6861-4525
darkglobe - 1891 1149 0016
SpaceGazelle - 2449-5820-0894
AndCallMeCharlie - 2878-9640-1728
Olimite - 5412-9888-7871
ShabbyMcCrabby - 3136-6620-1825
RetroGamr - 1392-5016-6947
dogfingers - 4038-6383-6798
Skondo - 5215-2418-6654
AJ - 2809-8903-8852
Cosby - 4871-4747-6383
tigerswiftly - 4012-4918-3847
Funkstain - 1349-6032-3423
LarryDavid - 0104-1286-0259
Vela / Bob - 3652 0550 7878
cindemon - 3437-3233-9772
wonderbanana - 0963-2393-0168
krs - 1435-6801-3191
kow - 0447-8377-1516


[b]The Street Pass Games Are:[/b]

[b]Current Puzzle Panels[/b]

[b]Name [/b]

Metroid: Other M
Mario & Bowser  
The Legend of Zelda  
Super Mario Galaxy 2  
Kirby 
Pikmin
New Super Mario Bros Wii 
The Legend of Zelda: Ocarina of Time 3D  
Star Fox 64 3D 
Super Mario 3D Land 
Mario Kart 7 
Rhythm Heaven Fever
Donkey Kong Country Returns
Pilotwings Resort 
Kid Icarus: Uprising 
Mario Tennis Open
Fire Emblem: Awakening
Kirby's 20th Anniversary
Luigi Mansion 2
Super Mario Bros 2
Kirby's Adventure Wii
Animal Crossing: New Leaf
Dillon's Rolling Western: The Last Ranger
Heroines
Xenoblade Chronicles
New Super Mario Bros. U + New Super Luigi U
The Legend of Zelda: Skyward Sword
Mario & Luigi: Dream Team Bros
Pokemon X & Y


[b]REMEMBER!![/b]
Additional Blue pieces can be collected via StreetPass or purchased for 2 PlayCoins. Purchased pieces are generated at random.
Additional Pink pieces can only be obtained via StreetPass. As of August 2013 you can now access Street Pass Relay. This means that when you pass a nintendo zone hotspot it will save your mii to streetpass in the future. Then the next person who passes it will get your mii. This works for you too so you will get the street pass from the last person who visited the Mc Donalds/Starbucks etc. You can see where they hotspots are on the nintendo uk website. 


[b]Street Pass Quest[/b] - which is the main way to get cool hats for your mii

The two main resources for getting hats for street pass 1 and 2 are:
http://www.gamefaqs.com/3ds/625899-streetpass-mii-plaza/wiki/3-2-hats
^ This link will give you the list of Hats and where you can find them
http://www.neoseeker.com/resourcelink.html?rlid=251604&rid=219212
^ This link will give you the MAP which corresponds to the naming convention in gamefaqs.

So go to the gamefaqs link, grab the hat and the room you need to go to then go to the neoseeker link and search the room name. You'll get the room number then you can look up on the map to the route you need to take to get to it. Some hats need multiple finishes to get them.

If you can't get past a shield (yellow is tricky as not many people have yellow) then use red or dark blue magic. Common question so adding it here. 

[b]StreetPass Squad[/b]

This is paid content and is a game like R-type. You shoot enemies and strengthen your ship by collecting Street Passes. The colour of the mii determines the weapon you get. Its fun, has a great learning curve and probably the best of the paid dlc. 

[b]StreetPass Garden[/b]

I thought this was crap when I first got it but there actually quite alot to do in the game. Its also one of the paid DLC games which you will always get something good when you get a streetpass. You will either get a seed or growth so you never waste hits. Thats good. Its also got an artistic side in the way you construct your gardens when you have enough cash from growing flowers and plants. 

[b]StreetPass Battle[/b]

This is a decent paid DLC game but I dont think it warrants buying individually. You, as king, take on other monarchs with your army. Your army grows by streetpassing and inheriting their army size (how many hits they've had to date) however its not quite so simple as if they have a huge army you can only fight or hope they will give you some soilders. It can be the case that you get 8 sp hits who have about 10 people in their army each. Thats not gonna help when you need an army of 26k :D however you can use coins effectively in the game to build your army. Its pretty simplistic. 

[b]Streetpass Mansion[/b]
My second favourite game of the paid DLC. Its a RPG type game where you get pieces from each Streetpass you get. The pieces go together like a puzzle and then you fight ghosts. You level up etc and there are 30 levels. Its quite a monster of a game, probably will take you the longest to complete. Not easy and alot of figuring things out yourself.

[url=http://www.nintendo.co.uk/Nintendo-3DS/Download-Content/Hotspot-Finder/Hotspot-Finder-116574.html]http://www.nintendo.co.uk/Nintendo-3DS/Download-Content/Hotspot-Finder/Hotspot-Finder-116574.html[/url]