April 07, 2020, 05:04:22 pm
(↑ Back to the ItemDex index.)
(hex:A3) is a glitch item in Pokémon Yellow. It is a Rival's effect glitch item and appears to function as a menu item that brings up a message that it won't have any effect.
This glitch item as well as Rival's in Red and Blue, is where the Rival's effect got its name.