I did it to get twin bridges as well. Or i do it because i'm bored of the file i've got now. (Usually rubbish file)
Wifi Codes:
Animal Crossing:
Code: 1246 5475 6781
Tow name: Sh!no XX
Name: Sh!no
Mario Kart DS:
Code: 4983 1623 6621
Pokemon Diamond:
Code: 5412 7208 6899
Name: Sh!no