(hex:6D) is a glitch item in Pokémon Red and Blue.
The name of this glitch item is mojibake from from Red/Green's untranslated ブロンズ (Bronze) string. "ブロンズ" is also the name of the hex:6D glitch item in the Japanese versions.
Using this glitch item outside of battle forces the next battle to use the Gym Leader battle music.
It will also set the number of steps until the player takes poison damage to 2 if a Pokémon is poisoned.
If the player's party is fully fainted, using this glitch item will set the number of steps required to black out to 2. This can be repeated to avoid having to save and reset the game to work around the black out (see poison step avoidance glitch).