Final Fantasy Echoes of Time R4 lag!

Im using an R4 and it lag very bad when go on WiFi. Anybody know whats wrong? or how to fix it??? i really need help here..

Does it lag with other games?

um no it doesnt just this one.. and my connection is 100%. any help?

It happens with many people. It just lags a lot with this particular game.

Final fantasy is a good game but your know WiFi is not so easy! i tryed and the game crased

Continental usually works fine, worldwide will lag