(hex:BA) is a glitch item in Pokémon Yellow.Outside of battle, this glitch item brings up Professor Oak's message that it isn't the time to use the item.
Within a battle it is possible to use the item where the quantity of the item is decreased. It possibly has the same effect as a Dire Hit due to it taking its effect pointer from item 0xBA-0x80 (0x3A: Dire Hit).