In radio communications, a forward link is the link from a fixed location (e.g., a base station[?]) to a mobile user. If the link includes a communications relay satellite, the forward link will consist of both an uplink (base station to satellite) and a downlink (satellite to mobile user).
... in Japan and Europe but not in the United States.
However, because the GBA has no region lockout, European games will work fine on a U.S. GBA unit, and apparently, even a ...