(hex:65) is a glitch item in Pokémon Red and Blue.
The name of this glitch item is taken from はやぶさバッヂ (FalconBadge); an unused string in the Japanese games that was left untranslated, resulting in mojibake. はやぶさバッヂ is also the name of the hex:65 glitch item in Japanese versions.
Using this glitch item causes arbitrary code execution at D11C in WRAM.