OKAGE: Shadow King

A Mega Stone is an item that can be used to cure any status ailment. They can be purchased from the merchant in Triste for 400 Sukel. Status ailments apply to things like paralysis, poison, sleep, seal or lock. In battle, you should notice three boxes to the left of each character's name. The left box is status, the middle box is curses and the right box is attribute. If the left box is any color besides gray (or black since that means they've been K.O.ed) then the character has a status ailment. If you are having trouble finding an enemy that inflicts a status ailment, go to the Addashi Desert and encounter enemies until you find the Shrewd Bear. The Shrewd Bear has an attack called Virus which inflicts a random status ailment to your characters. Once encountered have all your party members Wait until Virus has been cast, then you can use a mega stone on the afflicted character for the trophy.