Every Cascoon remembers each injury they suffer in this helpless phase, and when they evolve, will return like a ghost to avenge these wounds tenfold. Yet despite this reputation, there are many who give them ample reason for vengeance. No wild pokemon has learned to avoid Cascoon, and a few particularly sadistic ones toss them out of trees, walk over them, or attempt in vain to crack their nigh-unbreakable shells.
A strange tradition in Hoenn assures people that they can not die if a living Cascoon holds a grudge against them, so the elderly march out into the forests whenever they fear death to abuse Cascoon; half die of Dustox venom before other causes can end their lives. Whoever first spread this rumor must have hated Cascoon even more than Cascoon hate their abusers, for he has wrought a vengeance upon them all more terrible than they can even dream. For a Dustox to hatch out of their Cascoon shell, they must both have suffered a wound, however slight, and grown powerful enough to avenge it. (Cascoon trainers send them to battle against weak wild pokemon so that they may evolve quickly and need not exert a brutal revenge.) Most Cascoon are wounded multiple times before evolution until they someday hatch to take their vengeance on each foe, starting with the strongest.
Yet even the most determined and powerful of these pokemon may find their efforts stymied and spend generations in this form, hurt yet unchanging, for the living may not harm the dead. They wait a terrible eon until the wheel of life turns and they find someone they think to be the reincarnation of their tormenter. This is why the most tortured and mutilated victims of Dustox are those who have never even stepped on a Cascoon.