i did it!!! i've defeated the emerald weapon without any materia equipped!!!!!!!! hehehehe i just equipped cloud and the rest of my party with their strongest weapon and just wait for the limit break to come. Occasionally i would use hero drink and megalixir.. the counter was roughly had 1 minute left when the Great Weapon bites the dust... hehehehe u guys should try it to.. but of course u must have all of u'r party's ultimate limit break...