Codes from Nintendo:

ASI (Asia)
AUS (Australia)
EUR (Europe)
FRG or DEU (Germany)
FAH (France & The Netherlands (Holland))
ITA (Italia)
JPN (Japan)
KOR (Korea)
NOE (Nintendo Of Europe)
SCN (Scandinavia)
ESP (Spain)
UKV (United Kingdom)
USA (United States of America)
WLD (Worldwide)