What are passwords in the 3DS version of SSF4 for?
What are they? How are they used? What kind of dark magic is this?!
I think you are talking about the passwords to unlock character figurine. If so, follows what i found (i've not tested):
Super Street Fighter 4: 3D unlock character figurine passwords
1-5:
- Gold Blanka: DmdkeRvbxc
- Gold Chun-Li: zAAkcHVbHk
- Gold E. Honda: uUDsTlmbUN
- Gold Vega (Dictator): CgIsQNWbHu
- Gold Zangief: hinsVnebTu
6-10:
- Silver Makoto: GHakWCTbsl
- Silver Rose: GKkkXXtbSe
- Gold Guile: qeJkznDbKE
- Gold Ryu: KjckTnSbwK
- Silver Sakura: uzTsXzIbKn
11-15:
- Special Akuma (Gouki): uQHkWgYbJC
- Silver Dan: rDRkkSIbqS
- Silver Ibuki: ilMsRBabpB
- Silver Juri: OfQkARpbJR
- Silver Ken: NyosHgybuW
16-20:
- Silver Akuma (Gouki): RYSsPxSbTh
- Silver Balrog (Claw): PqUswOobWG
- Silver Chun-Li: tLWkWvrblz
- Silver Cody: naMkEQgbQG
Source: here.
I found diogum's answer to be inaccurate and incomplete.
This Japanese wiki list offers a more accurate and complete list of the Figurine Passwords.
The Figurine Numbers are in no particular order.
No. | Character | Color | Costume | Lv | Password | Note(s)
---------------------------------------------------------------------------------------------
1 | Ryu | Gold | Original | 7 | KjckTnSbwK |
2 | Ryu | Silver | Original | 7 | DPrkMnybCd |
3 | Ryu | Special | Arrange2 | 6 | imMbAAcbPH |
4 | Ken | Silver | Arrange1 | 7 | NyosHgybuW |
5 | Chun-Li | Gold | Original | 7 | zAAkcHVbHk |
6 | Chun-Li | Silver | Original | 7 | tLWkWvrblz |
7 | Chun-Li | Silver | Original | 7 | hjekwnEbxG |
8 | Chun-Li | Special | Original | 6 | BuykPjdbFb |
9 | E. Honda | Platinum | Original | 7 | uUDsTlmbUN | (lowercase L)
10 | Blanka | Gold | Original | 7 | DmdkeRvbxc |
11 | Zangief | Gold | Original | 7 | hinsVnebTu |
12 | Guile | Gold | Original | 7 | qeJkznDbKE |
13 | Dhalsim | Silver | Arrange1 | 5 | JKbsOVHbVC |
14 | Vega | Silver | Arrange2 | 7 | PqUswOobWG |
15 | Sagat | Silver | Original | 7 | QWzkDXWbeH |
16 | M. Bison | Gold | Original | 7 | CgIsQNWbHu | (uppercase I)
17 | M. Bison | Silver | Original | 7 | EebkxqWbYJ |
18 | C. Viper | Silver | Arrange2 | 7 | xopknDzbqS |
19 | Rufus | Bronze | Arrange2 | 7 | nnhksyvbZy |
20 | El Fuerte | Silver | Original | 7 | mhikghwbsf |
21 | Abel | Gold | Arrange1 | 7 | wRqsWklbxT | (lowercase L)
22 | Seth | Gold | Original | 7 | PkwkDjqbja |
23 | Akuma | Silver | Original | 7 | RYSsPxSbTh |
24 | Akuma | Special | Arrange2 | 7 | uQHkWgYbJC |
25 | Gouken | Silver | Arrange1 | 7 | awvbqIDbWd | (uppercase I)
26 | T. Hawk | Silver | Arrange1 | 7 | tWEsvzubiz |
27 | Cammy | Silver | Original | 7 | dfukkvGbdt |
28 | Cammy | Special | Original | 7 | evSkTnQbwQ |
29 | Fei Long | Silver | Arrange1 | 7 | MzisXzabBF |
30 | Dee Jay | Silver | Original | 7 | DaRkBPubLf |
31 | Sakura | Silver | Original | 7 | uzTsXzIbKn | (uppercase I)
32 | Rose | Silver | Arrange2 | 7 | GKkkXXtbSe |
33 | Gen | Gold | Arrange2 | 6 | kGzstOybxs |
34 | Dan | Silver | Original | 7 | rDRkkSIbqS | (uppercase I)
35 | Guy | Silver | Original | 7 | AjtsAbWbBD |
36 | Cody | Silver | Original | 6 | ATjbYbObru |
37 | Cody | Silver | Arrange1 | 7 | naMkEQgbQG |
38 | Ibuki | Gold | Original | 6 | tvfsYAPbDo |
39 | Ibuki | Silver | Arrange1 | 7 | ilMsRBabpB | (lowercase L)
40 | Makoto | Silver | Original | 7 | GHakWCTbsl | (lowercase L)
41 | Dudley | Platinum | Original | 6 | ZRhsNTMbIA | (uppercase I)
42 | Adon | Bronze | Arrange1 | 6 | jeNbhRXbFR |
43 | Hakan | Silver | Original | 6 | rLPbyLgbUy |
44 | Juri | Silver | Arrange1 | 7 | OfQkARpbJR |
45 | Juri | Special | Arrange1 | 7 | vvlbccVbMk | (lowercase L)