Weight will reduce the land speed of a character and also lower his evasion characteristic. This will make it harder for the effected target to avoid attacks and also almost impossible for it to run away or catch up to a target. For this reason, it is very useful in the strategy known as kiting. Due to some players soloing Notorious Monsters far above their level while taking very long times to do so, the development team has made every NM created in the past few years completely immune to the status.