(hex:75) is a glitch item in Pokémon Yellow. It is also an unterminated name glitch item.
Using the glitch item outside of battle with a 0x50 sub-tile early on the screen may restart the current map after A or B is pressed twice, sometimes corrupting overworld sprites for the next maps the player goes to. Interestingly when A is pressed once on this glitch item, the player can adjust the cursor from "Use" to "Toss", leaving the cursor pressed down on "Use".
Sometimes using the Select button it is possible to add a down arrow cursor next to "Use" as well.
Excessive use of this glitch item may result in a freeze.