(hex:9A) is a glitch item in Pokémon Red and Blue. It is an unterminated name glitch item.As it is an unterminated name glitch item, it has effects associated with those items, and can be used for screen data exploits like LOL glitch, Yami Shop glitch or will usually cause the TMTRAINER effect in battle.
Using this glitch item both from outside of and within battle with a 0x50 sub-tile early enough on the screen will give Professor Oak's message that it isn't the time to use the item. To apply this in battle it is possible via GameShark code 0150A0C3 or theoretically OAM DMA hijacking.