It will work on an American xbox
SORRY! Only American wii games work with American wiis. Unless hacking or modding works!
PAL games will only work on a European wii, as the wii is coded to send PAL signals, or you need to modify a Japanese, North American, or other wii to become region free.
DS games are region-free, a Japanese DS game will work fine on a DS from the US.
American DS games will work on an European DS. The original Nintendo DS handheld game console was available between 2004 and 2007.