Introduction Nidorino glitch

{Misc R/B} The Intro Nidorino Glitch is a glitch in Pokémon Red and Blue Versions. During the introduction to the game, where Professor Oak speaks, a Nidorino appears when he says, "This world is inhabited by creatures called POKéMON." Right after the message is displayed, a Nidorina's cry is heard. This is simply probably due to a simple oversight by the programmers.