Brain stone

Brain Stone さとりのいし Comprehension Stone
Artwork of the Brain Stone from the Mother 2 strategy guide
Type	Key item
Appears in	EarthBound

The Brain Stone is a key item in EarthBound. While intended to prevent loss of concentration, a bug prevents it from serving it's intended purpose, and in fact does nothing.

Usage

The Brain Stone has no effect whatsoever. It was intended to prevent loss of concentration during battle for the party member who has it in their inventory, however a coding mistake results in the code that checks whether or not the party member is carrying the Brain Stone from activating, thus resulting in the item never working in battle.

Prices

Buying	Selling
EarthBound
Not for sale	Cannot be sold

In-game description

EarthBound

•

A miraculous stone that enables you to "concentrate" without using your own brain. This is accomplished just by your keeping this item. This is great because if you can't concentrate, you can't use PSI.

Where to obtain

Limited quantity	Infinite quantity
EarthBound
In Poo's inventory from the first time he is controlled

Items of the EarthBound series

EarthBound Beginnings
Battle items • Capsules • Equippable items • Key items • Miscellaneous items • Recovery items • Status boosters
EarthBound
Battle items • Broken items • Capsules • Equippable items • Key items • Miscellaneous items • Recovery items (condiments) • Status boosters
Mother 3
Battle items • Equippable items • Key items • Miscellaneous items • Recovery items