I Cannot for the life of me figure it out. I got an M3 a couple months ago, my cousin inspired me to get one because he had one, and it was great. But here is the weird thing: I can play online games with my cousin Like Metroid PH, FF-CC, ect. and when it comes to platinum i can play with him too (wi-fi chatting/trading/battling), but i cant play wi-fi with my friend, whom doesnt have an M3 but has Pearl. BUT here is the thing: my cousin CAN! and we have the same hardware same software and same versions and everything! I can however DS to DS trade and battle with my friend but i cant wifi. its not the router because my cousin can play with my friend on wifi, and its not mine because i can play with him. I even tried using his exact rom and sav files to be able to wifi with my friend but still no luck. and nither of us use any type of code. its getting to the point where i dont know what to do. Does anyone have any ideas at all? Sorry for the long story btw.