Game mechanics/Trading

Trading is when some characters buy or sell items, weapons, armors and accessories. There some 2 types of shops such as Item shop and Gear Shop. But some secret items, weapons, armors, or accessory cannot found in Shops. It can be found in secret treasures, fighting an enemies for rewards, or just upgrading junk into rare things like Epic Battle Fantasy, Mario and Luigi Rpg Series, and other Rpg games.