In Super Mario RPG, players will be able to jump using the B button while exploring the overworld to discover hidden treasure chests that cannot be seen with the naked eye. These chests are home to some useful items for Mario and the gang during battle, such as Special Flowers and Frog Coins. It'll be pretty hard to find these things normally, but thankfully, there's an item called the Signal Ring that players can get that will alert them of nearby hidden chests. This guide will go over how to get the Signal Ring in Super Mario RPG and where to find all the hidden chests in the Mushroom Kingdom region.