(hex:8C) (from "Too bad! The trade was canceled!") is a glitch item in Pokémon Yellow.
It is both an unterminated name glitch item and a Rival's effect glitch item.
When a 0x50 sub-tile is early in the saved screen copy, this glitch item will function the same as a Lemonade in healing 80 HP or returning the unusable message if a Pokémon's HP is full.
If the 0x50 sub-tile is not present early enough in battle the game will freeze.