I have never tried SSBB online yet , was playing the adventure mode.

I always go online with DR.Mario , Tetris Party , FIFA 2009 , Cue Sports Revolution , Mario Kart (at times) , but most of the time GHWT and GHM , no lagging issues except for FIFA 2009 at times it lags not as often.

You can add me if u playing anyone of these above tru PM