(hex:6A) is a glitch item in v1.0 of Pokémon Yellow (Japanese).Using this glitch item outside of battle causes the game to stay with the cursor selected on use ("つかう") until the menu is opened again with Start.
When used in a wild Pokémon battle, it will allow the player to partially escape from battle.
When used in a scripted Pokémon battle or a Trainer battle, it will cause the battle to restart.