MissingNo.

Pokémon species caused by a programming error

MissingNo. is a glitch and an unofficial Pokémon species found in the video games Pokémon Red and Blue. Due to the programming of certain in-game events, players can encounter MissingNo. via a glitch. It is commonly regarded to be one of the most famous video game glitches of all time. Encountering MissingNo. causes graphical anomalies and changes gameplay by increasing the number of items in the sixth entry of the player's inventory by 128.

This keyword could refer to multiple things. Here are some suggestions: