I've search all places on the net on how to add and remove a new characters, and can't find any luck. If there is a tutorial somewhere can any point it out for me, or show me how can i add and remove characters on ssbb. I would appreciate the help. thanks
You can't "Add" characters into Brawl. And as for removing them, your best bet would be hiding them from the CSS...
you can't do this you can judt replace them. to do this you must put the FitCharMotionEtc.pac, FitChar.pac, and FitChar0#.pac in private/wii/app/RSBE/pf/fighter/<charName>